How Do I Exclude a Specific File from Prefetch?
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Thread: How Do I Exclude a Specific File from Prefetch?

  1. #1
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    How Do I Exclude a Specific File from Prefetch?

    i disabled prefetching in my xp pro. everything is ok except that my theme doesnt load at bootip. is there a way to exclude all prefetch files except for the one responsible for loading my theme? if so, which is the file responsible for themes?

  2. #2
    Super Moderator SpywareDr's Avatar
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    Did you try setting EnablePrefetcher to 2?

    http://msdn.microsoft.com/en-us/libr...dded.5%29.aspx

    Key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Session Manager\Memory Management\PrefetchParameters
    Name: EnablePrefetcher
    Type: REG_DWORD
    Value: 0

    The EnablePrefetcher key can have one of the following values:

    0 = Disabled

    1 = Application launch prefetching enabled

    2 = Boot prefetching enabled

    3 = Application launch and boot enabled

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    Quote Originally Posted by SpywareDr View Post
    Did you try setting EnablePrefetcher to 2?

    http://msdn.microsoft.com/en-us/libr...dded.5%29.aspx

    Key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Session Manager\Memory Management\PrefetchParameters
    Name: EnablePrefetcher
    Type: REG_DWORD
    Value: 0

    The EnablePrefetcher key can have one of the following values:

    0 = Disabled

    1 = Application launch prefetching enabled

    2 = Boot prefetching enabled

    3 = Application launch and boot enabled
    i've read this info before.. i understand what '0' obviously means. but what do 1,2,and 3 mean?

  4. #4
    Administrator Steve R Jones's Avatar
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    1 -> applications that you open are used by prefetch
    2-> Windows apps etc that launch during bootup are used by prefetch (apps like windows themes)
    3-> both of the above

    Why did you disable prefetch? Its generally considered a good thing


    The Prefetcher is a component of versions of Microsoft Windows starting with Windows XP.[1] It is a component of the Memory Manager that speeds up the Windows boot process, and shortens the amount of time it takes to start up programs. In Windows Vista, SuperFetch and ReadyBoost [2] extend upon the prefetcher and attempt to accelerate application and boot launch times respectively by monitoring and adapting to usage patterns over periods of time and loading the majority of the files and data needed by them into memory so that they can be accessed very quickly when needed.

  5. #5
    Intel Mod Platypus's Avatar
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    Why on earth would you want to disable prefetch, it's a significant optimization in XP, and will also cripple boot file optimization on the hard drive.

    Edit: Steve posted much the same thought while I was typing...

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    Quote Originally Posted by Steve R Jones View Post
    1 -> applications that you open are used by prefetch
    2-> Windows apps etc that launch during bootup are used by prefetch (apps like windows themes)
    3-> both of the above

    Why did you disable prefetch? Its generally considered a good thing
    hi steve and platypus.. i read somewhere that disabling prefetch would increase boot speed. but if you dont suggest this, i'll return all prefetch values to '0' in the registry.

    !!!IMPORTANT!!! within the Prefetch folder, i created a subfolder called 'x'. and i moved many of the prefetch files to this folder. i did this thinking it would cut down boot time. now, when i try to move them back to the Prefetch folder, i get a warning saying "Acess is denied"

    i then tried to change the attribute of this subfolder by unticking 'Read Only'. but when i try again to move the contents of this subfolder to the Prefetch folder, i still get the "Acess is denied" message and i'm unable to move files. what do i do?

    ---- EDIT ----
    i managed to fix the above problem by setting permissions to administrator (me). thus, i was able to move all the files back to the prefetch folder.

    one question... whats the best value to set in the prefetch registry to boot up faster? 1, 2 or 3?
    Last edited by oblad; August 10th, 2012 at 01:05 PM.

  7. #7
    Administrator Steve R Jones's Avatar
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    Don't worry about moving anything back. The items will automatically get replaced as you re-boot and run different apps.

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    Quote Originally Posted by Steve R Jones View Post
    Don't worry about moving anything back. The items will automatically get replaced as you re-boot and run different apps.
    but whats the best value to set in the prefetch registry to boot up faster? 1, 2 or 3?

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    Super Moderator SpywareDr's Avatar
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    Quote Originally Posted by Platypus
    Why on earth would you want to disable prefetch, it's a significant optimization in XP.....
    I dunno if it is or not bud!!

    Everytime i am using an XP computer I DELETE THE PREFETCH FOLDER and the response is MUCH BETTER!!! (I think it just bogs stuff down)

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    Quote Originally Posted by Dude111 View Post
    I dunno if it is or not bud!!

    Everytime i am using an XP computer I DELETE THE PREFETCH FOLDER and the response is MUCH BETTER!!! (I think it just bogs stuff down)
    hi dude.. when you delete the prefetch folder, do you also modify the prefetch value in the registry?

  12. #12
    Intel Mod Platypus's Avatar
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    Quote Originally Posted by Dude111 View Post
    Everytime i am using an XP computer I DELETE THE PREFETCH FOLDER
    A commonly quoted myth.

    http://en.wikipedia.org/wiki/Prefetcher

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    Quote Originally Posted by Platypus View Post
    well i deleted my prefetch folder. i didnt notice any performance boost. but unfortunately, my theme wouldnt start. so i restored the deleted prefetch folder. i did modify the prefetch value in the registry to '2'. and so far, its working well.

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