Prefetch 1 where it is registered. Prefetch what kind of folder can I delete?

It’s difficult to follow developments without being an expert operating system Windows. But there are basic concepts that every user must understand. Knowing which folders are responsible for what in Windows will make it easier to navigate the system. An example of files unknown to us is the contents of C:/Windows/Prefetch.

Purpose of the folder

Let's answer the question: why do we need the Prefetch folder? When Windows starts, it analyzes programs that we often use (we open them ourselves or using startup). The system then creates information about these programs, which it stores in special temporary files in the Prefetch folder. Subsequently turning on Windows these files speed up loading of the OS.

The OS component is responsible for performing this work. If you remove them, no changes will occur. The next time you start it, Windows will again collect current data about programs and place it in the Prefetch folder. However, loading the OS may take a little longer than usual.

Prefetch was first used in Windows XP. With the advent Windows Vista the folder was supplemented with SuperFetch technologies (responsible for analyzing frequently launched applications) and ReadyBoost (responsible for increasing performance). You can find it in this path: C:/Windows/Prefetch.

Managing the Prefetcher Service

You can control the operation of the Prefetcher service in the registry editor:

This parameter operates with values from 0 to 3, which mean:

0x00000000 - disabling the component;
0x00000001 - acceleration of application loading;
0x00000002 - Windows startup acceleration;
0x00000003 - acceleration of OS and application loading.

The default value is 3. To disable the service, enter the value 0 and restart the PC.

Important! The developers made sure that the Prefetch folder did not accumulate files (and gigabytes of disk space), creating a limit of 128 trace files.

Answers to questions

Is it possible to delete the Prefetch folder and the data it stores?

No. This doesn't make sense for three reasons:

Should I empty the Prefetch folder or not? Give good advice, because the data contained in it is used by applications when loading Windows, which means they can directly affect the startup speed of the operating system.

Prefetch folder

In this Windows folder saves data files containing information about launched applications. Naturally, life in our operating system does not stand still, many programs are deleted and replaced by others, which means that the information in the Prefetch folder needs to be periodically updated, clearing it. All loading programs will immediately enter their data into this folder again, at this point, Windows startup will slow down a little, but all subsequent loading of the operating system will happen for some time faster.
Then the Prefetch folder will again be filled with unnecessary information. Personally, I delete data from the Prefetch folder once a month, it’s not worth visiting this folder more often, if you can gain here in launch speed, it’s very little...

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Questions and debates about the Prefetch folder are not uncommon. Many people ask why the Prefetch folder is needed and whether its contents can be deleted. In this article we will try to understand how the Windows operating system uses the Prefetch folder.

What is the Prefetch folder

There is a myth that in the Prefetch folder...

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The Prefetch folder can be found in Windows XP, Vista, 7, 8 at the following path: C:\Windows\Prefetch - it is a component of the operating system and speeds up the process of booting the OS and frequently used programs. For the first time this technology was used in Windows XP, and starting from Vista it was supplemented with SuperFetch and ReadyBoost technologies. Launching an OS or application is accompanied by reading data from memory; often the same file has to be accessed several times, which is very irrational and takes a lot of time. Windows optimizes code loading by storing trace files in the Prefetch folder, which it processes in its own way.

To configure the Prefetcher folder, we need a registry editor. I would immediately like to duplicate the warning from the Microsoft website: “Incorrect use of the Registry Editor can lead to serious problems requiring reinstallation of the operating system. You use the Registry Editor at your own peril and risk.”

Click Start...

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Removing unnecessary files

You know, I never understood the purpose of the Temp folder in Windows. I mean, I don't know why it's needed or what it does. For example, if the installation of a program fails, then certain files are copied to this folder that are subsequently not needed; they can simply be deleted without causing any harm to the system. If there is a malfunction, be sure to check the Temp folder; you will probably find a lot of files in it, taking up precious space on your disk.

Temp folders are located in two places: C:\Windows\Temp and C:\Documents and Settings\Username\LocalSettings\Temp. By default, the Local Settings folder is hidden, so to see this folder you will have to enable the appropriate option. Now go to these folders and delete all the contents.

If you haven't opened these folders before, you'll probably be shocked by what's going on in them.

What is the Prefetch folder

The Prefetch folder is located in the system...

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Mad Cat@k Sage (15885) 3 years ago

The purpose of Prefetcher Service is to reduce application startup time and system boot time. The files used by this service are located in the %systemroot%\prefetch folder.
Management is carried out using the following registry key, which is also used by various tweakers:
HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\PrefetchParameters
DWORD EnablePrefetcher, the parameter can take the following values:
0 - disable service
1 - application prefetching
2 - prefetch applications launched at system boot time (used by Windows Server 2003 by default)
3 - both prefetchers are enabled (items 1 and 2) used by Windows XP by default
Restart your computer for the changes to take effect.
Much depends on the tasks for which the system is used. If you turn on your computer and immediately launch Contra or...

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I found an interesting folder that many people saw, but were afraid to delete something in it. This folder is called “Prefetch” and is located inside the Windows folder. What kind of folder is and why it is needed you will find out below.

What is Prefetch?

Prefetcher - operating room component Microsoft systems Windows, which speeds up the boot process and also reduces the startup time of programs. Prefetcher first appeared in the Windows XP operating system. Starting with Windows Vista, it was supplemented with SuperFetch and ReadyBoost technologies.
It turns out that this system watches which programs you use most often and writes them to a special folder: C:\Windows\Prefetch

There are all sorts of different files stored there with strange extensions like this.

Well anyway Windows boot loader analyzing these records, it pre-drives the software into RAM to then speed up the response to your request.

By default, entries in the prefetch folder are made not only by system ones, but also by secondary ones...

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While checking the Windows XP SP3 system after cleaning it from viruses, I looked for files using certain parameters and came across the folder C:\WINDOWS\Prefetch.

This is approximately the same as the Applog folder in Win98. In general terms, the files store the order in which fragments of the corresponding programs are loaded, which allows Windows to extract from disk into the cache a fragment that will be needed in the near future, before it is actually requested (while the processor is busy with other things). Thus, the next time there is a real request for this fragment, it will be taken not from the disk, but from the cache, which speeds up the launch of programs, including the loading of XP.

All this is possible...

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Attention: this is an archive, i.e. This section is no longer updated. New version Computer FAQ is located here. All new questions and answers are now there.
However, nevertheless, here in this archive there is a mass useful information- please view.

What is the Prefetch and Temp folder for in Windows XP? Is it possible to remove virus-infected files from them?

Vladimir answers:
The Temp folder stores temporary files. You can safely delete it from there. In the Prefetch folder - I don’t remember exactly what is stored there, but you can also delete files from there, there will be no problems.

Leshiy answers:
The Prefetch folder contains programs that are loaded when Windows starts, in order to quickly launch these same programs. It is not only possible to delete, but also necessary, otherwise too many of them accumulate and this slows down the startup and operation of Windows itself. Look at what you really use often, and put the rest in the trash!

Markiz answers:
Regarding Prefetch...

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what is the Prefetch folder?

The Prefetch folder is located in the Windows system folder and is used to speed up the loading of the operating system and the launch of programs. On startup Windows computer monitors the download process. After this, the received information is stored on hard drive in the Prefetch folder. The next time you start, this information is used to speed up the loading of the operating system. The same thing happens when you launch any program.

This folder is a folder with temporary files and deleting its contents will not lead to any consequences. At next boot Windows computer will fill the folder with new, up-to-date data about loading the operating system and programs.

There is a myth that outdated and irrelevant information accumulates in the Prefetch folder. Therefore, to speed up Windows boot It is recommended to empty this Prefetch folder from time to time. In reality, emptying the Prefetch folder does not make the operating system boot faster. More...

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Disabling Superfetch and Prefetch for SSDs in Windows 7.

In this article, we will look at how you can disable Prefetch and SuperFetch in Windows 8 and Windows 7 on SSDs. In this article, we have seen how Windows 8 treats Defragmentation on Solid State Drives. Before we begin, let me make it clear that it is not a good idea to disable SuperFetch or Prefetch in regular HDD mode, but for solid state drives, that's a completely different matter!

SuperFetch, Prefech and SSD in Windows 8

Every time you run an application on your computer, a Prefetch file is created that contains information about the files, it is loaded by the application and specially created by the Windows operating system. All the information that the Prefetch file contains is mainly used to optimize the loading time of the application next time. you run this application. SuperFetch tries to predict which applications you will run in...

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Brief terminology

Prefetch (English) – prefetch (from memory); pre-select, select (from memory) in advance.

Fetch (English) – sampling (for example, commands or data from memory); select (command or data from memory); fetch (an element of the swap strategy that determines when a page is transferred from disk to memory, for example, prefetch, used in Windows NT, transfers not only the selected page to memory, but also several subsequent ones).

How to reduce application loading times

To reduce application loading time, select program shortcuts one by one (on the Quick Launch Bar and on the Desktop, as well as in the Start -> Programs menu);

– click right button mouse call context menu–> Properties;

– in the Properties dialog box: open the Shortcut tab;

– Click at the end of the Object text box, make a single space and enter /prefetch:1;

– click...

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Answers:

Vladimir:
The Temp folder stores temporary files. You can safely delete it from there. In the Prefetch folder - I don’t remember exactly what is stored there, but you can also delete files from there, there will be no problems.

Leshiy:
The Prefetch folder contains programs that are loaded when Windows starts, in order to quickly launch these same programs. It is not only possible to delete, but also necessary, otherwise too many of them accumulate and this slows down the startup and operation of Windows itself. Look at what you really use often, and put the rest in the trash!

Markiz:
Regarding Prefetch, here's what I found. The prefetch folder (.pf extension) contains information. about frequently opened programs. and services for faster subsequent loading. You can remove everything from it, the system will boot faster, and the programs (for the first time) will load slower. Then the files are created again. You can clean it, you even need it sometimes.

Mamluk:
The prefetch folder also contains information about downloaded viruses. Therefore, when cleaning manually, it is not surprising that reinfection will occur. Therefore, it is necessary to clean it, or even better, set the mode not to write anything to the folder.

SHIKiGAMY:
I no longer have such a folder. I made a function \"don\"t prefetch\". Use special programs to remove \"garbage\" from \"temp\"s\" and prefetch. For example Ace Utilites or WinXP Manager.

Ivan:
Windows XP creates the %systemroot%\\prefetch folder by default. It is used to speed up the launch of recently used programs, which greatly slows down the system boot. If system boot speed is more important, follow the steps below. To disable this feature: HKEY_LOCAL_MASHINE\\SYSTEM\\CurrentControlSet\\Control\\Session Manager\\Memory Management\\PrefetchParameters set the EnablePrefetcher parameter to 0.

It is difficult, without being an expert, to keep track of the development of the Windows operating system. But there are basic concepts that every user must understand. Knowing which folders are responsible for what in Windows will make it easier to navigate the system. An example of files unknown to us is the contents of C:/Windows/Prefetch.

Purpose of the folder

Let's answer the question: why do we need the Prefetch folder? When Windows starts, it analyzes programs that we often use (we open them ourselves or using startup). The system then creates information about these programs, which it stores in special temporary files in the Prefetch folder. The next time you turn on Windows, these files speed up the loading of the OS.

Prefetch was first used in Windows XP. WITH the advent of Windows The Vista folder was supplemented with SuperFetch technologies (responsible for analyzing frequently launched applications) and ReadyBoost (responsible for increasing performance). You can find it in this path: C:/Windows/Prefetch.

Managing the Prefetcher Service

You can control the operation of the Prefetcher service in the registry editor:

This parameter operates with values from 0 to 3, which mean:

0x00000000 - disabling the component;
0x00000001 - acceleration of application loading;
0x00000002 - Windows startup acceleration;
0x00000003 - acceleration of OS and application loading.

The default value is 3. To disable the service, enter the value 0 and restart the PC.

Important! The developers made sure that the Prefetch folder did not accumulate files (and gigabytes of disk space), creating a limit of 128 trace files.

Answers to questions

Is it possible to delete the Prefetch folder and the data it stores?

No. This doesn't make sense for three reasons:

Now about one more useful function, her name is Prefetch.
This feature is designed to optimize the loading experience of the apps you download. So that they load faster the next time you boot.
If I remember correctly.

It would seem, why should we touch her?
The fact is that over time, a lot of files from the applications that you launched accumulate in the Prefetch folder. And if, in addition, something was installed and deleted, then the files in Prefetch from remote programs remain. And this begins to slow down the system.
Because when loading windows systems tries to find all files that are listed in Prefetch.

There is no clear opinion on what to do about this; some recommend deleting and emptying this folder at every boot, some clean it once a week; most users advise disabling it altogether.
But this function is certainly useful.
The only thing is to clean it if you have the ability to install and remove different programs maybe once every two weeks.
If you just use already installed programs, you can sometimes clear them when you remember. :)
These same files, or rather, their common denominator - the \Windows\Prefetch\layout.ini file - are then used by the defragmenter to optimize the location of files on the disk, which further reduces loading time.

If you're not yet confused, Prefetch is a built-in optimization function.
What is she doing?
This function is designed to reduce the loading time of applications, those that are loaded at system startup and those that you often use.
So Prefetch contains files from the most frequently downloaded programs, sometimes not from frequently downloaded ones. I don’t know on what principle Windows selects them. Maybe as God will put it on your soul.
And then windows waits until you leave your computer and go smoke, drink tea, etc. I don’t remember exactly after what time, in my opinion after 20 - 30 minutes of machine inactivity.
Windows, according to the data in the Prefetch folder, begins to shuffle programs that are often used to load faster to the beginning of the disk.
Just like I mentioned, it optimizes the loading of programs, in addition to moving them.

But often, when optimizing their system, users unwittingly disable this function.
The fact is that for normal operation this service needs three things that are often disabled. Or rather, two of them are turned off.
1. Built-in defragmenter
2. task scheduler
3. Doctor Watson (although I don’t remember exactly).

It is advisable to remember this.

So what else can we do?

1. Delete either all files from this folder or files from those programs that are no longer on the machine.

2. find HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\PrefetchParameters\
There's a key there EnablePrefetcher(REG_DWORD)
The values that apply to it are (0, 1, 2, 3)
0 – disabled (Recommended for low-power computers)
1 – recommended for computers with RAM up to 256MB (Programs only)
2 – For those who have 512MB or more on board (programs and system libraries)
3 – This is already designed for super-duper powerful processors + minimum 512MB RAM, although with LargeSystemCache=1 it works great on 256MB RAM.
I recommend EnablePrefetcher=3

"Enable"="Y"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Dfrg\BootOptimizeFunction
"OptimizeComplete"="Yes"

There is one legend walking around the Internet.
That in Windows Vista all applications will launch and run 15% faster than in Windows XP. So you don't have to wait at all Windows release Vista, in order to experience all the delights of this cartoon, because... they are already included in WinXP SP2!!! All that remains is to enable this cartoon (Super Prefetch). This cartoon works ONLY under Windows XP SP2!

HKEY_LOCAL_MACHINE\SYSTEM\ CurrentControlSet\Control\Session Manager\ Memory Management\PrefetchParameters\
1. Create a type parameter
DWORD
Value Name: EnableSuperfetch
Value: 1

2. Someone says that you need to create a separate section.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\
Create a section Prefetcher
Create a type parameter
DWORD
Value Name: EnableSuperfetch
Value: 1

Opinions are divided, there are comments about the myth of this parameter, there are those who have noticed an increase in productivity.
In any case, to check. You have nothing to lose and nothing to gain except an extra entry in the registry.

P.S. If anyone has a beta version of Vista, please export the branch HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\Control\Session Manager\Memory Management
And send it to me if you don’t mind.