Here is what you have to do:
1) Open the regedit tool Start -> Run -> regedit.exe
2) Use the navigation in the left and go to HKEY LOCAL MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management
3) Double click the DisablePagingExecutive attribute, and put 1 in the decimal value field
This will make the drivers and the XP kernel run in memory.
4) Double click the LargeSystemCache attribute, and put 1 in the decimal value field
This will improve performance of the kernel
5) Double click the IOPageLockLimit attribute. On some later versions of windows XP that doesn’t exists, so if this is the case you’re done Otherwise you have to put to the hex value : 4000 for pcs with 128 mb ram, 10000 for 256 mb ram and if you have more put 40000. This value specifies how many bytes can be used for I/O operations in your system.
[Source: digg /gibberishtalk.com]
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Several errors here.
DisablePagingExecutive:
By default Windows will always attempt to keep the kernel in RAM. Only under times of heavy memory load will it be paged out. This setting prevents this from occuring. If adequate memory is available this will not occur often. At best there is little to be gained, at worst it will impair performance.
LargeSystemCache:
This is a potentially dangerous setting. Microsoft clearly documents that this setting is for systems used as servers, and then only in specific cases. It is not appropriate for general use. It tells the system that caching has priority over memory for applications. Good for servers, bad in other cases.
This setting is dangerous with some common hardware configurations. It can cause a variety of problems, including data corruption. Some users have had to reinstall Windows to restore operation. Investigate thoroughly before attempting this setting. You have been warned!
IOPageLockLimit:
This setting is not supported on any version of XP. In fact, support ceased as of Windows 2000 Service Pack 1.
Larry Miller
Microsoft MCSA