Windows XP
1. Press the 'Windows' and 'R' keys simultaneously.
2. Type 'Regedit' and press 'Enter.'

3. Navigate to 'HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\PcHealth\ErrorReporting'.
4. Right-click 'DoReport' and select 'Modify.'
5. Change the value from '1' to '0' and restart your computer.
Windows Vista / 7:
6. Press the 'Windows' key and 'R' key simultaneously.
7. Type 'Regedit' and press 'Enter.'
8. Navigate to 'Hkey_users\S-1-5-19\Software\Microsoft\Windows\Windows Error Reporting'
9. Right-click 'Disabled' and change the value from '0' to '1'.
10. Restart your computer.