Hi,
what WIN do you have ? Are all ServicePacks and Windowsupdates applied ?
Where exactly were the infected Files found (full path/folder/filename, e.g. c:\Windows\system32\virusfile.exe) ?
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It depends:
Viruses should be repaired if possible, trojans/worms can be deleted, but SOMEtimes some system modifications have to be reversed BEFPOREHAND..
--> IT's always best to only block or move files until you get some info on how to properly remove the malware..
MOVING: Where ?
-> where you told avast to move the file to..
either to avast's chest, or avast's MOVED folder, or to some other folder..
see avast's scan-report/logs to find out what you did, if you can't remember
also look there for the malware/virusnames & original locations: without this info, we can't help you more specifically