Disable Prefetch for low memory systems

Posted in Windows XP by Community Submission

If you're like me your system only has about 128megs of RAM.  The Windows XP Prefetch can take a lot of this up by preloading programs at boot as well as preloading programs you often use thus sucking away your available RAM.

On my system, a Dell PIII 866 with 128 megs of RAM, I was able to greatly boast my system performance by disabling Prefetch all together.  It used to take a half hour for the disk to stop thrashing after stopping Nortons SpeeDisk,  Now it stops instantly.

Note:  This tweak worked for this user and their system configuration but disabling prefetch on other systems may have a bad effect as it might free up ram but it also could increase program start up time.

Here's how to disable Prefetch.

1. run "regedit";
2. goto [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\PrefetchParameters\EnablePrefetcher];
3. Set the value to either 0-Disable.
4. reboot.

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