I've been using Keepvid Pro (paid version) for a few months to download Youtube videos. Yesterday, after a download was complete (using Edge as browser), I tried to exit Keepvid but go a message that the program was still working. After waiting a moment, tried to exit and same message. This time, I exit Keepvid...and discover that close to 1TB of data on the data drive had been wiped out. Guess that's why the program was busy. Luckily, I had a recent backup, but something seems seriously wrong with KeepVid Pro. Sharing this to avoid you this mishap and hope that Norton will took a look at this because it all happened while I was running Norton and anti-malware.