I have some how managed to download some sort of trojan. AVG reports regular that there is a problem, identified by Trojan horse Downloader.Agent.BF
also comes up with a file it is in eg C

WINDOWS\system\msxr32.exe
to many others to list over the 24 hours since it started. Several sweeps with the restore switched off, with updated AVG 6 and Ad-aware 6.0 and it still keeps poping up, I have even run AVG from the command prompt but the programme didn't kill it. Also my Internet explorer home page will not change from res://rcvki.dll/index.html
no matter what I do.
Also while doing searches with google.co.uk for clues another, american based search engine pops up with it's list of results.
I have run Norton Antivirus Trojan finder from the web site and it found nothing.
Currently running AVG 6 again, part way thru and reporting 34 and going up files, Downloader Agent.
Help I feel a total cleansing of the hard drive coming on....