: Paste your unique 25-digit code into the text box and click the green "Activate Now" button. Important Safety Considerations

The software scans your computer’s registry—a massive database of settings and options for the Windows operating system—and promises to remove obsolete, corrupt, or malicious entries.

This is a nuanced question. WinThruster is —it is not a virus, and it does remove some junk files and invalid registry entries. However, many experts (including those from How-To Geek and TechRadar ) argue that it is unnecessary .