I am worried that the PIC will only be able to deal with one loop at a time, and if that is the case then...

When fans come on it will be stuck for 10 seconds doing one thing when maybe the user wants to turn the system off.

So if that is the case, then I may need to make use of interrupts.

and I will look at the datasheet in a little while, racing in Forza 2 ATM, damn Ferrari is hard to drive with AI at hardest difficulty.