Also, even though this happened after this started happening, last night I had mistyped a URL and one of those generic search engines came up. The ones with the incorrect URL entered at the top of the page, with several links below it. However, this window just closed. I didn't click close, it didn't do anything strange beforehand, it just... poofed. I've been a bit paranoid that this might be a keylogger or something, but seeing as how I know nothing of computers, these fears are probably just me freaking out over it. >_>
Anyway, thanks.