popups...

When I get that mess, I run a C-search for everything in the intruder's title...
Then I carefully check-out what was found, in properties, and on the Net, before I uninstall and/or delete what the search found...

When you have a "mad-monkey" intruder in the PC, always run an internet search on it, to read what others are saying about it... Like you should always do with unknown emails, before you open them, if you must open them...
With questionable emails, surf the name or email address, adding the words "scam, virus" to the search words... Make it a habit... Change from IE and OE, to SeaMonkey... It's faster and cleaner, and a lot more secure... IE is a hacker-target... I set a firewall to block IE from the Internet...

Sometimes you can find those bad-things in Control Panel's "uninstall programs"...

Sometimes running a system restore to an older registry backup will eradicate the problem.. but sometimes that can seriously mess-up your latest installs, updates, and files... Before running a restore, make a CD-RW backup of all your treasures.. including favorites (or bookmarks), music, videos, files, and pix...