This has happened to me on a school computer a few times. And it most definitely ain't fat fingers.
Since there is other problems it could be a virus.
start -> run -> msconfig -> startup and then check if there are any bad things in there. If u don't know what something is just google it. Then uncheck the bad ones and reboot.
Oh, and make sure that u don't disable anything important, some viruses have their process name almost identical to some windows applications.