Avast not detecting virus/malware

Avast Free Antivirus / Premium Security
1

I’ve been running Avast for a while, and upgraded to Avast 5 when it came out, but within the past couple of weeks, I’ve been having virus or malware-like behavior on my computer. It began as my browser redirecting me when I tried to open links in search engines, and this happened with any browser and any search engine(tested on IE and Firefox, and used Google, Bing and Yahoo) but recently(began on 8/18/2010) my windows has begun to freeze without beginning a memory dump, so one by one, the programs will freeze up if I click on anything on them.

They will basically respond until I try to make them do any sort of processing(eg. clicking on start scan in Avast freezes Avast, trying to open Avast from the toolbar freezes explorer.exe, trying to open a new tab in firefox freezes firefox, etc.) I do not get this problem in Safe Mode, but when I boot into normal Windows mode, it always happens, without fail, and starts seemingly at a random time.

I’ve set up Avast to run on a custom scan, looking for everything and anything that could be harmful, and it comes up with nothing every time. I’ve also tried using SUPER anti-spyware, Malwarebyte’s Anti-Malware, AVG 9.0 Pro, and Hitman Pro 3.5. Nothing returned anything of interest, other than a couple tracking cookies in SUPER.

Also I’ve noticed that when I try to schedule a boot-time scan, in either normal windows or safe mode, it says that it’s scheduled, but when I restart, it doesn’t ever bring it up, it just goes back into windows, and when I check it says that there is no scan scheduled.

I am running Windows 7 Ultimate, by the way. Not sure how much that helps, but I really do need help on this.

EDIT: Hitman Pro 3.5 claims that there’s a “Possible variant of the TDL3(alias Alureon) rootkit detected” I’m not sure exactly what this means, but I thought it might help.

Thanks so much,
Robert

2

If you have TDSS then run this

Please read carefully and follow these steps.

[*]Download TDSSKiller and save it to your Desktop.
[*]Extract its contents to your desktop.
[*]Once extracted, open the TDSSKiller folder and doubleclick on TDSSKiller.exe to run the application, then on Start Scan.

http://i466.photobucket.com/albums/rr21/JSntgRvr/TDSSKillerMain.png

[*]If an infected file is detected, the default action will be Cure, click on Continue.

http://i466.photobucket.com/albums/rr21/JSntgRvr/TDSSKillerMal-1.png

[*]If a suspicious file is detected, the default action will be Skip, click on Continue.

http://i466.photobucket.com/albums/rr21/JSntgRvr/TDSSKillerSuspicious.png

[*]It may ask you to reboot the computer to complete the process. Click on Reboot Now.

http://i466.photobucket.com/albums/rr21/JSntgRvr/TDSSKillerCompleted.png

[*]If no reboot is require, click on Report. A log file should appear. Please copy and paste the contents of that file here.
[*]If a reboot is required, the report can also be found in your root directory, (usually C:\ folder) in the form of “TDSSKiller.[Version][Date][Time]_log.txt”. Please copy and paste the contents of that file here.

3

Fantastic! Thank you so so much, it said I had an infection in disk.sys, and it removed and replaced the file after a reboot. I’m booted into normal windows mode right now, and I’m waiting to see if anything starts freezing, but so far it seems to be working!

Thank you so much,
Robert

4

No problem - if you want me to check out the rest of your system just ask ;D