Hi, welcome to the forums.
Please
Help us to Help you In order to help fully we need more information....
- What OS are you using? is it up to date?
- What avast! version and VPS file (virus database) number, e.g. 0436-4 (see about avast!)
- What was the virus name, what was the filename, where was it found
example (C:\windows\system32\infected-filename.xxx)?
- What actions have you taken to try and resolve the problem?
Also see this thread for further information and advice
User's FAQ.
Advice & Tools for virus/trojan/malware Removal & Prevention