I just put together a new computer last night and I am having an issue with the welcome screen in Windows 7 Home Premium. I have only done a few Google searches to find a solution, but I can't find my exact problem anywhere. The problem is that once windows asks for my login's password, I can't type for about 10 seconds. It's very frustrating, because I bought an SSD and I figured it would allow me to start windows a lot faster, but with this wait, it's almost the same.
I am using a USB keyboard and it allows me to access BIOS, etc during startup, so I don't think it's an issue with it not recognizing it fast enough. I have not installed any windows updates. If you need me to list my hardware, please say so. I do not have the time at this moment.
try a non usb keyboard if you have one--i think you will find it is down to the keyboard--its silly really and has annoyed me for years--you can access the bios with a usb keyboard even without windows or a hard drive being installed but as soon as it hits windows it needs a driver--make sure the keyboard has a driver installed--it may just come up as a human interface device and make sure all the motherboard drivers are installed
look at the usb settings in the bios--enable usb keyboard and mouse if they arent already and see what other usb options you have that may speed it up recognising the keyboard