didn’t it rather say something like “scanner status: Infected” ?
This is a bit misleading, but rather means, that a virus/trojan was found.
avast itself was NOT infected…

to both of you:
Please work through the link in my sig “virusRemoval” and

  • supply more detailed info, e.g path/filenames
  • secure your System & IE, or this stuff will always come back
  • use ad-aware, spybot, cwshredder to clean
  • use KAV, Trend & RAV Onlinescanners to identify recurring variants…