Just upgraded my system from CIS 3 to CIS 4 [free]. Firewall works OK now butwhen I try to update the antivirus signature files I get “Error Comodo antiVirus failed to initialise” I have tried to restart, reboot, unload , reload to no avail.
HELP!!!
Welcome to the forum hess.ralph 
What virus database does it say in Miscellaneous / About
Also have you tried Miscellaneous / Diagnostics
Dennis