I am working on a friends computer. She has been running with no virus protection of any kind for sometime. I loaded spybot and ran it and loaded avast last night. avast ran and removed 220 infected files. I rebooted and spybot did its boot scan, I left that running while I went to bed. When I closed out spybot and noticed avast had a big red x on it.
Avast is not running at all, clicked fix, clicked start program, went to add an install and repaired avast from there, still nothing.
THe computer is a pentium III with 256 RAM. running windows XP pro ( this was installed by someone she took the computer to years ago, it is not a genuine copy, if that matters)
Uninstall avast from Control Panel (if possible). If, for any reason, you can’t run it, try booting in Safe Mode and doing it from there. Anyway, boot after that.
Run the avast! Uninstall Utility saved on 1. If, for any reason, you can’t run it, try booting in Safe Mode and doing it from there. Anyway, boot after you’ve run it.
Install avast! using the setup saved on 2. Boot.
Register your free copy or add the license key for Pro.
Check and post the results.
After that, I suggest:
Clean your temporary files.
Schedule a boot time scanning with avast with archive scanning turned on. If avast does not detect it, you can try DrWeb CureIT! instead.
Use MBAM (or SUPERantispyware or even Spyware Terminator) to scan for spywares and trojans. If any infection is detected, it is better and safer to send the infected file(s) to quarantine (Chest), rather than simply deleting them.