This might be an issue if the paging file is not setup properly on the computer, follow the steps below to setup the paging file:
1. Right click on Computer.
2. Click on Properties.
3. Click on Advanced System Settings.
4. Click on settings in Performance under Advanced Tab.
5. Click on Advanced Tab in Performance Options Window.
6. Click on Change.
7. Uncheck “automatically manage Paging File size for all drives”.
8. Select C:/drive.
9. Select “System Managed Size”.
10. Click Set.
11. Click OK.
12. Now restart the computer when it prompts for a restart.
If the issue still persists, then you may try Memory test, follow the steps below:
1. Click Start.
2. Type in Windows Memory Diagnostic in Start Search.
3. Click on Restart now and check for problems.
This will fix any memory related issues on the computer, make sure save all the files before you perform this test.
If the issue still persists, then I suggest that you run virus scan on the computer and check.
You may also run online Virus scan from the link:
http://safety.live.com