If you were told you have Virut, and asked to read this topic, I am afraid I have bad news. 
Virut damages files so bad that you will have to do a format of your hard drive, and reinstall your operating system to get fully clean of this infection. Please read this entire topic so you can understand why it is the recommended form of removal.
(Article has links. Look for them with blue text)
Introduction
Virut is a Windows Operating System murderer.
Virut is a polymorphic file infector with IRCBot, backdoor functionality which infects .pif, .htm, .html, .exe, .scr, .doc, .pdf, and .jpg files. Sometimes even more files.
Virut downloads more malware to your system, and opens a back door, using the IRCBot that takes control of your computer.
When Virut creates infected files, it also creates non-functional files that are corrupted beyond repair. In many cases the infected files cannot be disinfected properly by your anti-virus. When disinfection is attempted, the files become corrupted and the system may become irreparable.
AVG Overview of W32/Virut
Either way you can end up with a computer system so badly damaged that recovery is not possible and it cannot be repaired. When that happens there is nothing you can do besides reformatting and reinstalling the OS.
Keygen and Crack Sites Distribute VIRUX and FakeAV
YOUR IDENTITY
If your computer was used for online banking, has credit card information or other sensitive data on it, you should disconnect from the Internet until your system is cleaned. All passwords should be changed immediately to include those used for banking, email, eBay, paypal and online forums. You should consider them to be compromised. You should change each password using a clean computer and not the infected one. If not, an attacker may get the new passwords and transaction information. If using a router, you need to reset it with a strong logon/password so the malware cannot gain control before connect again. Banking and credit card institutions should be notified of the possible security breach. Because your computer was compromised please read:
Other helpful links
Guide for format and reinstall:
http://www.helpmyos.com/tutorials-software-alternatives-to-proprietary-f19/how-to-reformat-and-reinstall-your-operating-system-the-easy-way-t1307.htm#3143
Virut damages files so bad that you will have to do a format of your hard drive, and reinstall your operating system to get fully clean of this infection. Please read this entire topic so you can understand why it is the recommended form of removal.(Article has links. Look for them with blue text)
Introduction
Virut is a Windows Operating System murderer.
Virut is a polymorphic file infector with IRCBot, backdoor functionality which infects .pif, .htm, .html, .exe, .scr, .doc, .pdf, and .jpg files. Sometimes even more files.
Virut downloads more malware to your system, and opens a back door, using the IRCBot that takes control of your computer.
When Virut creates infected files, it also creates non-functional files that are corrupted beyond repair. In many cases the infected files cannot be disinfected properly by your anti-virus. When disinfection is attempted, the files become corrupted and the system may become irreparable.
AVG wrote:There are bugs in the viral code. When the virus produces infected files, it also creates non-functional files that also contain the virus...Due to the damaged caused to files by virut it's possible to find repaired but corrupted files. They became corrupted by the incorrect writing of the viral code during the process of infection. undetected, corrupted files (possibly still containing part of the viral code) can also be found. this is caused by incorrectly written and non-function viral code present in these files.
AVG Overview of W32/Virut
Either way you can end up with a computer system so badly damaged that recovery is not possible and it cannot be repaired. When that happens there is nothing you can do besides reformatting and reinstalling the OS.
TrendMicro wrote:...warez and crack web pages are being used by cybercriminals as download sites for malware related to VIRUT and VIRUX. Searches for serial numbers, cracks, and even antivirus products like Trend Micro yield malcodes that come in the form of executables or self-extracting files...quick links in these sites also lead to malicious files. Ads and banners are also infection vectors...
Keygen and Crack Sites Distribute VIRUX and FakeAV
YOUR IDENTITY
If your computer was used for online banking, has credit card information or other sensitive data on it, you should disconnect from the Internet until your system is cleaned. All passwords should be changed immediately to include those used for banking, email, eBay, paypal and online forums. You should consider them to be compromised. You should change each password using a clean computer and not the infected one. If not, an attacker may get the new passwords and transaction information. If using a router, you need to reset it with a strong logon/password so the malware cannot gain control before connect again. Banking and credit card institutions should be notified of the possible security breach. Because your computer was compromised please read:
Other helpful links
- How Do I Handle Possible Identify Theft, Internet Fraud and CC Fraud?
- What Should I Do If I've Become A Victim Of Identity Theft?
- Identity Theft Victims Guide - What to do
- When should I re-format? How should I reinstall?
- Help: I Got Hacked. Now What Do I Do?
- Where to draw the line? When to recommend a format and reinstall?
Guide for format and reinstall:
http://www.helpmyos.com/tutorials-software-alternatives-to-proprietary-f19/how-to-reformat-and-reinstall-your-operating-system-the-easy-way-t1307.htm#3143
