Identifying Registry Errors
1. Launch the suspected application or program.
2. Wait for the program to open.

3. Read the error message presented on the screen if the program failed to open, or check the program's features to ensure that everything is working properly. If the program opened and worked successfully, there are no registry errors.
Fixing the Registry on Windows Vista
4. Click on 'Start.'
5. Type 'Systempropertiesprotection' in the search bar.
6. Open the System Properties Protection program.
7. Select the 'System Protection' tab.
8. Click on 'System Restore.'
9. Select the 'Choose a different Restore Point.'
10. Click on 'Next.'
11. Select the restore point from the list, and click on 'Next.' Your computer will restart now.
12. Click on 'OK' to confirm the restoration process once you have logged on again.