CCleaner
1. Download and install the latest version of CCleaner (see Resources).
2. Launch CCleaner. Click on the 'Registry' icon in the left menu.

3. Click the 'Scan for Issues' button. CCleaner will check your registry for errors. Click the 'Fix selected issues' button to delete the bad files in your registry.
Free Registry Cleaner
4. Download and install the latest version of Free Registry Cleaner (see Resources).
5. Launch Free Registry Cleaner and click on 'Scan Now' from the menu on the left. Free Registry Cleaner will check for errors.
6. Click the 'Fix all' button to repair all the errors, or select only the errors you want to fix by clicking on them and then clicking the 'Fix selected' button.
Eusing Free Registry Cleaner
7. Download and install the latest version of Eusing Free Registry Cleaner (see Resources).
8. Launch Eusing Free Registry Cleaner and click on 'Scan registry issue' from the menu on the left. Eusing Free Registry Cleaner will check for errors.
9. Select the errors you want to fix and click on 'Repair registry issue' from the menu on the left.