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What to do if my computer is infected by a virus or a malware?

Can Anybody suggest me a tool or something else to solve 'Google search redirect virus' ? i tried Malwarebytes' Anti-Malware and avira antivirus but i already have this problem. my search results when i search something in google redirect me to unknown sites and unregisterd domains . I have this problem both in FF4 and FF3.*

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marked as duplicate by Mokubai, ChrisF, BloodPhilia, studiohack Mar 24 '11 at 23:00

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

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its not duplicate because i did try Malwarebytes' Anti-Malware But it did not help me. –  shaahin Mar 24 '11 at 22:12
    
Have you tried all the other options listed in that question, Spybot S&D, Microsoft Security Essentials, scanning using a LiveCD and other options? –  Mokubai Mar 24 '11 at 22:30
    
I did Try Spybot and Microsoft Security Essentials , but i didn't try Scanning using liveCd , –  shaahin Mar 25 '11 at 7:42
    
How was this marked a duplicate to the much more general virus question? Not every virus has the same removal instructions. –  James Lawruk Jan 26 '13 at 22:57
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3 Answers

up vote 3 down vote accepted

This "Google redirect virus" has been named "Backdoor.Tidserv" by Symantec.

They have a page about it and they offer a free removal tool, I recommend you try that.

This will happen in ALL browsers as the malware is local and unrelated to your browser.

Symantec Tidserv Removal Tool

I hope this helps you get rid of it!

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:( thanks , but my problem exist yet. –  shaahin Mar 24 '11 at 22:10
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This may be malware, but hijacking the search may also be the result of altering the DNS locally (hosts file) or on your router.

What about internet explorer/chrome? Do they have the problem as well? If yes -> go check your hosts file first: c:\windows\system32\drivers\etc\hosts. If www.google.com is listed, that's not ok. Also check your router's DNS settings. Some malware breaks into routers to change the dns settings. And that may be a good explanation why malwarebytes/avira can't find anything.

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I actually called Microsoft support on this for my brothers laptop and they have a hotfix as well. It was just a patch we downloaded from the internet on their support site. The phone tech walked me through it once, and I did it once by myself. Unfortunately, I only bookmarked it on my brother's machine.

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where can i ask for hotfix ? –  shaahin Mar 24 '11 at 22:10
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You could try this microsoft.com/security/pc-security/malware-removal.aspx or just go through the usual MS support site: support.microsoft.com/common/international.aspx I connected by phone with support for the OS on the issue but I'm not sure how I navigated to it, starting with the OS support, I suppose. If you find the number of the hotfix, post it here please. –  Ele Munjeli Mar 25 '11 at 22:44
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