I had computer problems the last few days -- stumbled into a stupid trap link. I think I rooted out the worst damage, but who can be sure?
A different bug is making the rounds, especially on GMail, a fake "event invitation" that comes from the pwned account of a trusted contact. I've received two of them and they're innocuous-looking enough that I hovered over the link before thinking better of it. It's easy to get so used to the routine spam and phishing that some of the old-time malware will bite you.