http://7gdw5os4uw3j6we7cksnwsx2zdj3gfxvdb4n7ofi3xhlqudcq6ogkxyd.onion/tech/index.html
Contrarily to other similar software there was no offer to create a System Restore point, nor any kind of backup file. It just corrected those things and period. I also found some drivers which apparently needed to be updated. Soon after the system started becoming sluggish, the Bluetooth (which had always worked perfectly with the same exact drivers and everything) didn't connect any new devices, and some things got stuck, like frozen.