Chances of being infected using 2 drives (one for Linux, the other for Windows)?

I'm a paranoid. I don't use Windows. But I still have a valid licence and I want to continue flying with FSX.

The problem is that I always consider the worse: A virus infecting Windows, then infecting my BIOS (rare, I know) or staying at RAM for a few minutes. Is this even possible? I hear that data can stay at RAM for a period of time, I just don't know how much time it is. And even so, malware written for Windows won't know what to do with an ext4 filesystem, and with such a system that don't have the same structure as Windows. Not to mention I won't have both HD's on at the same time, either I use the 1TB HD (that only has Linux), or I unplug it completely and then turn the Windows drive on.

But that's the problem. I'm a freaking paranoid. I know that the chances are close to zero, but you think that it makes a difference? LOL

Please give some advices.

 

Relax

 

The chances are absolutely zero.
Mrk