Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Blue Screen Problem

I encountered a blue screen within 24 hours after I installed the newest version of Registry Mechanic. When I rebooted after the bluescreen, windows came up, but both the mouse and the keyboard were not functioning. I tried rebooting again with the same result. Then I booted in safe mode with networking and was able to backup recent files, and do a restore using a restore file earlier that day. I also did an uninstall of registry mechanic. That was the only change that had been made to the system in the past 24 hours. After coming up on the prior restore file, I have not had any problems. I bought the product 3 months ago. I was starting to have some concerns about many registry errors found by other programs that it was not correcting. They recommended to upgrade to the latest version. This is when I got the blue screen. I asked for a refund but they responded that their refund has to be within 30 days from the original purchase date. Apparently there is no warranty on upgrades.