After the scan is complete Registry Cleaner and Fixer will show you complete list of invalid keys it has found. To remove the keys you have the option of either selecting each key and press the Delete Button or Press the Select All and Delete button to delete all the invalid keys.
When ever you press Delete button an Undo file is created in your My Documents folder which you can undo at any time either from Registry Cleaner and Fixer or from My Documents folder.
You are advised to be extremely careful when deleting the registry entries. Even though you have option to undo. Always have a current backup of your system (using the System files Backup and Restore tool). Systweak Inc. will not be responsible for lost files, data, or loss of information or any other damages.