Hi Stacey, and welcome to AF
That is really odd.
The problems with your PC and phone cannot be connected. Android and Windows have nothing in common, so that has to be coincidence.
There are also no true Android viruses. Malware exists for all platforms, but you have to install it. And if you are not rooted (which seems to be the case) there's no way it can survive a factory reset. So the question is, what's the common factor? Is it really the same symptoms in each case (eg caps sticking when texting), or are these a collection of symptoms you've seen at different times? And once you have seen the problems a reset makes no difference, or the problems go then reappear later?
You say you have tried without FB or your card. So to be clear, you did a wipe, then ran with no card and no FB login and the problems recurred? If so I think you can eliminate your FB and media as causes.