I have a client who tried updating Kaspersky and was unsuccessful. When we boot into windows the keyboard or trackpad does not work. Its not a hardware issue because i can choose safe mode, tried USB keyboard and booted into ubuntu and the keyboard and mouse worked fine. I tried removing all Kaspersky files and it did not help. I would think its in the registry and would check there but i cant get to it because I cant type anything in to get past the password. I also took the drive out and scanned for viruses and it came up clean.