1. Insert your Windows 7 installation disc into your computer's disc drive.
2. Start the computer and wait for it to boot from the CD.

3. Click on the language setting that you want to use and then click on the 'Next' button.
4. Click 'Repair your computer' from the menu that appears.
5. Choose the Windows 7 operating system from the menu and then click 'Next.'
6. Click on the 'Memory Diagnostic Tool' from the menu and wait for it to scan your system.
7. Reboot your computer to clear the error.