Windows uses a “paging file” to handle it’s virtual memory, which in a nutshell is simply temporary information stored on the hard drive. Because this file has the potential (by Windows default settings) to be growing and shrinking in size, it can be become fragmented and lower performance. By making your page file a constant size, you can prevent it from becoming fragmented which could boost your computer’s performance.

Here is how to do it:
1. Right click My Computer > Properties > Advanced > Settings (in the Performance box) > Advanced > Change.
2. Select the option for No Paging File and then confirm your changes.
3. Run a defrag on your hard drive (Start > Programs > Accessories > System Tools > Disk Defragmenter).
4. Reboot.
5. Open the Virtual Memory settings (step 1).
6. Select the option to manually set the size and enter the recommended value Windows suggests for both your minimum and maximum size.
7. Confirm your changes.

Now Windows will be working with a constant size file which will not become fragmented. After applying these steps, do not expect your computer to be significantly faster as this does boost efficiency, but the changes may not be immediately noticeable.