Fine Tune System's Memory

You need at least 256MB of ram to do this: 

Go to startrunregedit -and then to the following key: 

HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerMemory Management 

1.DisablePagingExecutive -double click it and in the decimal put a 1 - this allows XP to keep data in memory now instead of paging sections of ram to harddrive yeilds faster performance. 

2.LargeSystemCache- double click it and change the decimal to 1 -this allows XP Kernal to Run in memory and improves system performance a lot. 

3.Create a new dword and name it IOPageLockLimit - double click it and set the value in hex - 4000 if you have 128MB of ram or set it to 10000 if you have 256MB set it to 40000 if you have more than 512MB of ram -this tweak will speed up your disckcache. 
Rebot.