Help me! Vicious time-wasting malware

Usually I can nip these pains in the bud but this one really caught me off guard.

Whatever it is it downloaded fake anti-virus programs onto my computer yesterday. I can't tell you much because I was dumb and forgot to keep a record of the stuff I deleted but there was something called frmwrk.exe reported running on sysinternals and a program called altcompare on my add/remove programs list.

Today it replaced my wallpaper with some stupid virus warning and started re-directing my browser (firefox and chrome) to a fake malware warning. It also created a new user (I have Windows XP) but I don't remember what the user was called, I deleted it without checking. It also seems to have disabled task manager. I have Avira Antivirus but it looks like that's been screwed with, so I decided to try Hijack This

If it's of any use I will be forever grateful to the person who can solve the problem. I work from home and I have to clear this up before I can finish working on my project so I'm pretty annoyed at the waste of time.

Here's the HT logfile:

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 11:49:15, on 27-04-2009
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16827)
Boot mode: Normal



Again, forever indebted: I can't do much but I'm a photographer so if you live in the Greater Toronto Area I can offer you some free photography. If not I will write a very appreciative response and that will have to do.

Cheers,

Michelle





ADMIN EDIT: Please read and follow the following READ & RUN ME FIRST. Malware Removal Guide and HOW TO: Attach Items To Your Post, many thanks.

 

Sorry about the post, I didn't realize I wasn't supposed to do that until *after* I submitted and went on to read your post - I felt a little dumb, I gotta admit.

So the read&run procedure cleared up the majority of the nusiance but I still get redirected when I'm on firefox to spam sites - a bit of a nuisiance because I'm doing research and when I open stuff in tabs I have to check each one to make sure I'm on the page I want before I lose the link.

I share a network with a second computer and while I can access the second computer's shared files (it has no symptoms of a virus) it can't access my shared files. Again more of a nuisiance than anything but could be something worse behind it.

Also, I'm a bit worried by a message when I restart. In the blue windows startup screen, right before it shows the users (I'm on XP home, 32 bit) there's a message that says "lsdelete file not found, skipping autocheck" or something along those lines.

Lastly my antivirus program which is Avira's free version right now has to be started manually and I can't seem to change that back to auto start. I know didn't change any settings, so my computer is vulnerable for the first minute between the time I log on and the time I can get to Avira's start screen. I keep my computer on 90% of the time but it's still worrisome if a virus managed to manipulate my antivirus program.

I've attached the logs from the malware programs I ran, and I will be glad to add anything else. Take your time getting back to me, I fixed the majority of the headache and I appreciate that.