My computer has been running awfully slowly of late. I've run multiple scans with both Avast and Malwarebytes. Malwarebytes found a few pieces of tracking software but no dangerous viruses, and they've been eliminated. Didn't make much difference.
Two night ago I used CCleaner to scan the registry. Among the issues it found wee eight unused file extensions associated with GoogleDrive. I clicked "Fix," which should have deleted those entries from the register. Performance greatly improved. This evening I ran CCleaner again, and those entries popped up again. So I removed them again.
But where did they come from? I don't have GoogleDrive -- never have. I use Dropbox, and I have a Microsoft Onedrive account that I almost never use. So why does my registry keep getting entries for unused file extensions associated with GoogleDrive -- and why would those be making the computer run abysmally slowly?