Most of the people use anti virus when their computer got infected, why not before? So when your computer get infected and your anti virus don't detect it, instead of formatting your hard disk or Installing new anti virus and updating it is a time taking task.
So there are some alternates of it. Try different virus removal tools. Keep in mind that most of them are effective against certain viruses!
i)-Mcafee Stinger
This is a very nice tool by Mcafee. It's portable. Just download it and then scan you PC. It's quite effective against certain viruses and updated on the site regularly.
Download Stinger
ii)Microsoft Windows Malicious Software Removal Tools
A fine creation by Microsoft. This is a tool which is very effective against latest threats.
Download MS Removal Tools
iii)Kasper Sky removal Tools
Download Tool
iv) Malware Bytes
Most of the people think that is also a very good tool not more than 4mb so try. They will give you real time protection if you pay them so a virus detection software that offer your real time protection, your can say it a anti-virus but here your are using it free so it's a malware removal tool.
Download MalwareBytes
Avira Antivir Removal Tools:-
For all those experiencing the damaging effects of a virus infection, Avira's researchers have prepared a free removal tool, which can be used to eliminate major distinct threats.
Avira Removal Tools
vi)AVG removal Tools
They provide a list of specialized utilities for virus removal. The utilities can be used to remove some of the most common viruses. The list is updated on regular basis.
Download AVG Tools
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How to search a Specific virus Removal Tools?
If to search for pacific virus removal tools suppose win32/virut go to Google
and type "win32/virus remover" or "win32/virut removal tools", you will get the
result then download it.
syntax
virusname removal tool
or
virusname remover