After a scheduled Quick or Full scan, the Avast UI opens to the corresponding Scan page.
I am running Windows 7 64-bit, free Avast version 2014.9.0.2021. No other Virus software has been installed on my machine.
Things I have tried:
1) Making sure that opening scan results after scan complete option is unchecked
2) Run Control Panel / Programs and Features / Avast - Repair
3) Remove Avast, reboot in safe mode, run avast_clear.exe, reboot, reinstall Avast, reboot, test