yatot,
There are a number of reasons why a HDD wont be detected by the bios. However, from your post it would seem the HDD is dead, and it is not affected by a virus or otherwise. Having moved the HDD to another computer eliminates everything except the HDD itself, and what is on it. In your case, even if all the data is wiped off and there is a virus in the boot sector I would still expect to see it in the bios.

I dont know of any manufacturer who holds a 10year warranty on a HDD, so i don't think the T.E.C utility would be useful for guessing when your HDD will curl up and spit the dummy.