How to Clean Up a Windows 7 Registry

1. Click the Windows 7 'Start' button and type 'system restore' to open a list of Control Panel utilities. Double-click 'System Restore' to start the Windows 7 wizard.
2. Click the option labeled 'Choose a different restore point' at the bottom of the first window. This option lets you manually select a date to roll back the registry changes.
3. Choose a previous date to roll back the registry changes. Choose a date at which your computer ran more efficiently. Click 'Next.'
4. Click 'Finish' on the final screen. The registry restores to a previous date and any malware or affected registry entries are cleaned.