I have changed no hardware, and and think of no software changes that correlated with the onset about a week and a half ago.
As for P2P, I turn the programs off whenever I'm not actually using them. And who's to say I ever downloaded anything illegal?
I was posting here due to me not being able to locate the problem within any of "the usual suspects". My best idea so far was some flaky hardware...I got the router used, and the signal booster is a few years old. I'm probably wrong, but is there any way I can test my hypothesis?