how to clean viruses without deleting my data?

[cirus81]

hi...
i have a computer full of viruses and worms, but it contains a lot of personal data and files. when i scan my computer with avast free antivirus it asks me to delete some files and move others to chest. but im afraid to lose my files! because i scaned my flash memory and unfortunately avast deleted almost all of my files! and dont want to lose the data on my computer. and if i make back up on removable storage, the virus will move with them too. please help i dont know what to do...

[Asyn]

This needs further analysis by a malware removal specialist:
Go to this topic http://forum.avast.com/index.php?topic=53253.0 for information on Logs to assist in cleaning malware.
Use the information about getting and using the tools and attach the logs here, not in the LOGS topic.

[jeffce]

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