What you tried in the troubleshooting section has zero bearing to on-access scanning by the standard shield. Thank you for your patience and please forgive my bad english. No recent software or driver installation other than avast 4.8.Īvast home is free, so I have absolutely no right to ask for a fix, but indeed I hope that this problem will be corrected, since I like avast more than any other free or non-free antivirus

No problems detected on windows' event viewer and in avast log files. The only other resident security software is Kerio Personal Firewall 2.15, but it coexisted peacefully with avast for years. The last non-avast antivirus I had was F-Secure, but it was completely removed 3 years ago. Only standard shield was active, and sensitivity was set to Normal. OS is Windows XP SP2 (with the latest security updates). I tried to completely uninstall Avast and do a fresh install but the result is the same.

Interestingly, If I manage to switch off the standard shield, cpu usage remains at 100% but the system becomes responsive (although a little slower than usual). After a *lot* of time (more then 20-30 minutes) it goes back to normal.

Something is wrong with the latest avast (home) program update : approximately 2 minutes after boot, ashServ.exe starts using 100% cpu and the pc becomes unresponsive (it takes 30 seconds to open start menu, for example).

Avast firefox extension high cpu usage