system
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@LloydEwing,
What about a clean install of avast 4.8? I mean running the uninstall reboot into Windows Safe Mode, runinning the specific removal utility for avast 4.8 AND also for avast 6 (since you tried to install that version over the old one, but failed, so there may be remnants of version 6 too), and reinstall anew under Windows Normal Mode. Then reboot and register the Home Free again.