Norton ghost 15 on Win7 64bit, full system backups, with or without antivirus, always take 50 minutes. I would think it’s not that Comodo is scanning every file that Acronis backs up, rather it’s scanning the Acronis backup process itself excessively.
I’M backing up a 1TB drive Win7 64bit Professional with 8GB memory and an Intel I7 Quad core and I’m talking in hours not minutes. Are you backing up to disk? I’m going to a Netgear ReadyNAS NV via a 1GB lan.