DavidR
6
Was the avast installation made to the default location ?
If not, try a reinstall into the default location, uninstall, reboot, install, reboot.
What other security based software do you have that might block new startup entries, e.g. Spybot S&D (TeaTimer), AdAware (AdWatch), SpySweeper, Spyware Doctor (StartUpGuard), PrevX, WinPatrol, ProcessGuard, etc. ?