Constant 0s being entered

Had this happen once before some years ago, and I can not remember if it was a virus or a hardware issue.

The computer tries to continuously enter 0 (zeros) in any text entry area. Tried unhooking my keyboard and mouse to no avail, and I also tried rebooting into safe mode and it did the same thing there. I am running another virus scan to check but it hasn't found anything yet. ANY suggestions are appreciated while I am beating my head into the wall.

Matt

Not that it couldn't be but for reference, the keyboard is a Logitech Wireless Wave, and its about two months old.

I went ahead and pulled the usb dongle for the keyboard and let it sit and it still runs the zeros. After I tried booting into Safe Mode, which had the same problem, I pulled the dongle for the entire reboot into regular Windows and it again was entering zeros, and the keyboard had not been hooked up to the computer at all that time.

Running a virus scan again, and after it is done I am going to reboot and enter the bios, going to start to enter a new user password for bios and see if the text entry happens there. First off, its the only place I can thik of off hand in the bios where you have text entry, and secondly, if it happens there then it almost has to be a hardware issue.