DavidR
4
Yes you would have to uninstall the Comodo Firewall completely.
It could have been a corrupt installation since having Comodo firewall still installed.
After removal of Comodo, reboot and see if the AIS is working ?
If not - Try a repair of avast:
XP - Add Remove programs, select ‘avast! Anti-Virus,’ click the Change/Remove button and scroll down to Repair, click next and follow.
Vista, win7 - Control Panel, Programs & Features, uninstall a program, select ‘avast! Anti-Virus,’ click the Change/Remove button and scroll down to Repair, click next and follow.
You may need to reboot after the repair.