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Diskcache plays a very important role in WinXP. However, the default I/O pagefile setting of XP is conservative, which limits the performance.

Some better values for different RAM are given below to get some extra juice for speeding up your OS.

1. Run "regedit";

2. Goto [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\IoPageLockLimit];

3. Modify the value in Hex depending on the size of your RAM:

RAM: modified value(Hex)

64M: 1000;

128M: 4000;

256M: 10000;

512M or more: 40000.

4. Reboot.