To disable the use of the paging file in Windows XP, you should have at least 768MB of RAM.
To disable the paging file:
1. Use Control Panel to open the System applet.
2. Select the Advanced tab.
3. Press the Settings button in the Performance section.
4. Select the Advanced tab.
5. Press Change in the Virtual Memory section.
6. Select the No paging file radial button and press Set.
7. Press OK.