Avast will not delete viruses on my pc

i have installed and un installed several times and i have also done the clean up after the un installs and avast will still detect 90 viruses and it wont erase them please help. i am running windows 7 64 bits

Start a topic in V&W and post your logs there: https://forum.avast.com/index.php?action=post;board=4
Instructions (basic diagnostic logs): https://forum.avast.com/index.php?topic=194892.0