Hi,

some Info on those two file-infectors:

Liberty

Iceland

you could try

  • to repair avast:
    Controlpanel → software ->avast ->uninstall → repair
  • and do a subsequent boot-time scan

But I doubt it’ll help

if possible confirm and/or Clean the infections with online Scanners, e.g. Trend
→ see link “VirusRemoval” below in my sig

or use avast BART-CD

But if this is not a false positive, I’d advise

  • (maybe Data-backup via a Clean Boot-Medium) and then
  • FDISK
  • FORMAT
  • proper reinstall with reliable Setup-Media

Scan all your Floppies & other media for infection afterwards