It can be very tedious to scan all registry errors and determine which entries are safe to remove, and of course very dangerous to simply remove all registry errors.
It would be helpful to create filters to scan for registry errors within a specific vendor and/or product, and thus be able to clean only those entries.
For example, you just unistalled a product and would like to remove registry entries for that product which the uninstall process left behind, without removing entries for the Windows OS or other products.