Possible virus, not sure how to get rid of it...

I write this to you from my father's computer because my own computer is more or less incapacitated by something that might be a virus.
It keeps typing out dashes as if someone was holding down the key, even when there is no keyboard plugged in. This makes it impossible for me to start up my windows user as I can't type in my password. Somehow this also affects the computer outside of Windows, such as the boot menu and the like as well as the Hiren's BootCD based miniXP I have open as I write this to run SuperAntiSpyware to search for any possible infections that migh cause this.
But since the computer is also affected outside of Windows, I'm also starting to think that this might be hardware related.
I sincerely hope someone here will be able to help me since it's making it pretty much impossible for me to complete my basic web-builder exam project.

Thank you all in advance.

Christian Friis

 

Never mind... I'm pretty sure the keyboard input chip on the motherboard is damaged, since I have trouble imagining a virus affecting both Windows 7, Windows MiniXP and BIOS in the exact same way.
Now I'm just hoping that it's not the power supply unit reaching the end of it's lifespan that's causing the damage, since I can't afford to replace that many computer innards before I can start working again on my websites.