Does Carbonite create an image of your hard drive? I believe it is simply a data backup solution.
For real protection, get Macrium Reflect.
It will create a full image of your boot drive in about 20 minutes using VSS...which means it will do this while Windows is running.
Do an image once per week. Store it on an external USB drive if you like. If you get a virus, forget trying to defeat the virus...just wipe the drive clean by formatting it (any Live CD will do, Linux or WinXP) and then boot with the Macrium Reflect boot CD you createdand restore an image that you know is clean (Save the last 3 images you create) and then reboot the machine. It will be as if you never had a virus at all.
I use this software and have tested it numerous times. It is flawless...and it's FREE.
thanks for the tip...