USB and SATA have changed many things about configurations. USB data input devices (mouse, keyboard) are so common now that BIOSes have been changed to accommodate the ease of use that users want. The BIOS on many motherboards contains options for booting with these devices fully operational.
But, I don't think that hardware is your problem
...I think that you are infected with the Blaster worm, from what I read and what I experienced.http://forum.aumha.org/viewtopic.php?f=30&t=37614http://en.wikipedia.org/wiki/Blaster_worm
I was hit by a Blaster several years ago when I foolishly did not have my firewall working while I tried to Windows critical updates, after a clean install. A system doesn't need very much exposure to be attacked. i now recall the shutdown in 60 seconds thing.
Of course, I could be totally wrong...but I suggest running it by BleepingComputer.com - Am I infected What do I do - http://www.bleepingcomputer.com/forums/f/103/am-i-infected-what-do-i-do/
or at least awaiting opinions from someone who might shed more light on what's wrong.