Registry Reviver finds a lot of errors related to the current user of the PC (the person who is logged in when the scan runs). It scans environment variables, personal program groups, desktop settings, network connections, printers, and application preferences. Any wayward registry entries associated with these settings and preferences get added to the list [...]

There’s a standard scan that Registry Reviver performs every time you run it, and there’s a secondary scan as well called the Deep Scan. The deep scan is not enabled in Registry Reviver by default; you need to click the Scan button at the top, and select the Deep Scan check box. Then perform the scan.

When you start your PC, several programs launch automatically. These programs are set up to launch this way. However, when a program is removed incorrectly, often your PC will still try to launch it upon startup. That’s because the registry entry remains in your Windows Registry.