I got hit by one and I went in to search files, put in bho and came up with a list. BHO demon have a list on their website for you to copy and get rid of the bad ones. After you have done that install
http://www.winpatrol.com/ its free dont bother upgrading and it will let you know every time something is trying to download to your computor.
FROM THE BHO DEMON WEBSITE.
Sounds like you got hit by A Browser Helper Object, or BHO, is just a small program that runs automatically every time you start your Internet browser. Usually, BHO is installed on your system by another software program. For example, Go!Zilla, the downloading utility, installs a BHO created by Radiate (formerly Aureate Media); this BHO tracks which advertisements you see as you surf the Web.
The natural question is, what do BHOs do? The technical answer is "anything", but generally, it will have something to do with "helping" you browse the Internet.
Of course, many BHOs are what is called "ad-ware" or "spyware": they do things like monitor the websites you visit and report this data back to their creators."
They can also routinely conflict with other running programs, cause a variety of page faults, run time errors, and the like, and generally impede browsing performance.
A great little tool for viewing and, if required, disabling, the BHOs that may be installed on your machine is BHODemon, which can be downloaded
here
Listed BHO's are tagged X for certified spyware/foistware, or other malware, L for legitimate items, O for 'open to debate' and ? for BHOs of unknown status.
Hope this helps Bazf