Glad you have a Windows system. I don't know anything about Macintosh OS, or Linux, or just about anything else. Before I upgraded to Windows 10, I occasionally got a registry error in Windows 7. Have you tried defragmenting your hard drive? If you have and it didn't work, try using AVG Anti-Virus to help. I forgot exactly how to do it, because I got rid of AVG a while ago, but that certainly fixed it for me. Hope that helps.
Make sure you do NOT format your drive.