I was unplugging my usb receiver for my usb keyboard and mouse, to and plugged it into a diffrent port when i notice popped up say that the usb driver
was not installed correctly. Then another notice popped up saying that my internet was disconnected. (I have a usb router.) My mouse and keyboard didn't work now. I thought this was a fluke and restarted my computer.
Now and i cannot log-on. This happened a couple hours after installed Windows 7. I can however use the keyboard when the computer just boots up but not at the login screen.