How did you know your computer has virus? Did your antivirus found it or could not clean it? or, you are observing some mysterious things happening? Are you sure it is virus , not spyware?
Anyway, get AVG antivirus and spybot search%26destroy as antispyware. The reason I am recommending these because both can run in safe mode and from boot cd(something like BartPE).
Many others have already given you many list but no one said the key thing. How to clean?
Install those software and do update.
Method-1: First disconnect your internet connection(physically unplug wires). Then run spyware scanner first. Then antivirus. Then restart pc. Now I recommend run disk clean up: either use windows disk cleanup tool or get ccleaner(www.ccleaner.com). Clean all junk. Reconnect internet.
Method-2(better option): Unplug internet. start computer in safemode. Run antivirus first and then antispyware. restart computer in normal mode.
Method-3(best option when all above can't clean infection): Unplug internet. Make some boot security disk like bartPE. http://www.nu2.nu/pebuilder/ .
Now, boot from that cd and run antivirus and antispyware. it will clean to the root.
Hope you understand the importance of these steps.
Just as recommendation: After you clean infection, install a good firewall like zonealarm and use safe browser like opera(www.opera.com).
I have a virus in my computer is there any antivirus i can download for free to help me?network security
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