Cannot update Virus Database

I am new to Comodo and already love it.However I am having trouble updating the virus database.It downloads Base_End_User_v5584.cav (**>(MB) and stops. This has been haapening all day.My OS is XP Pro SP3 and am running CIS Internet Security.Can you help? Betty.

I will have to uninstall and go back to previous security suite untill resolved as I have no protection! Running diagnostics does not help. :cry:

No help in 48 hours!..ahh well. Will stick with Comodo Firewall which seems to be behaving itself,and go back to Avast anti virus…