1. Click Start, click Run, type sysdm.cpl, and then click OK.
2. In the System Properties dialog box, click the Advanced tab.
3. Under Start and Recovery, click Settings.
4. In the Startup and Recovery dialog box, click Edit.
5. Disable PAE mode by removing the /pae option if it exists.
6. If you are using Windows XP SP2, remove the /noexecute option if it exists, and then add the /execute option.
7. On the File menu, click Save.
8. To exit Notepad, click Exit on the File menu.
9. To close System Properties, click OK two times.
10. Restart your computer.