Download AVGfree AV, update it & then scan your computer...there's' a link for download in this thread: tools/options

That AV found the trojan which was causing the problems with options for the original poster. See whether that also fixes the popping up problem for you.

If not, look at Stew61's posts here in this thread...he did a system restore after using the BFU. Give that a try. If things are still bad, go to one of the malware removal sites listed in post #2 of this thread.