Keyboard/mouse works on boot but not login
Hey guys! trying to recover from a system crash here.. One of the issues was me not being able to install/uninstall microsoft antivirus, since it seems some files were deleted which it needed. I tracked that issue to yet another issue what windows installer could not start, which suggested me to check if it was enables in Msservice.exe, which I couldn't start either.
After some googling, I found a fix on MS website, which moved some dll around and asked me to reboot PC. After doing so, it stopped recognizing my keyboard and mouse (both usb) at the login screen, they are completely dead even thou they work on boot and in bios (and are detected in bios).
I tried to restoring to the point before the "fix", but same issue. Any ideas what I can do? I have recovery CD, but repair ain't helping, nor does safe mode. Windows 7, 64 bit.