On this configuration page you can define settings for full registry backup and scan process (Screenshot).
Here are the following options.
In Windows many registry keys are restricted for changes even for administrators. This option allows to hide registry keys that cannot be modified by user.
This option allows to set a max number of errors to be found per registry scan. In many cases Registry First Aid finds several hundreds or even thousands of errors in the registry. Scanning for all those errors and finding corrections may take a LOT of time. Also, as it is suggested to verify every correction suggestion, it is very hard to do so with hundreds of errors.
Default value is 1000.
This option defines if a pop-up message on reaching the scan limit will be displayed. That message allows to continue the scan or turn off the scan limit for all future registry scans.
See Paths to Scan for Corrections settings.
This option allows to select what user hives to scan - only hive of the current user or hive for all users. See the Scan all user registry files or only the current user file.