There are programs that will create images of the system disk with Windows running but these need to lock the drive to do so. Why? No changes are allowed to take place will making an exact duplicate. Otherwise, it's not exact. Acronis True Image, which I use, will do that. It can do scheduled backup images or amend them as incremental or differential types but it's going to lock the drive. As for just updating like a sync process, that won't work after new software installations as there are registry entries that need to be made. I'm sure you've considered other backup options so I won't offer alternatives as you appear to have a specific solution in mind. I doubt you'll find such a package but good luck anyway.
I was wondering if there is software out there that can clone a drive while logged on to windows? This is what I am trying to do.
I have a PC with two hard drives. HDD1 has my OS + different apps and files. I want to clone HDD1 to HDD2 to get an exact copy of HDD1. Then schedule to clone it again once a day at night but I dont want restart the PC to accomplish this or if I am working at night I don't want it to disturb me. That way in case HDD1 fails for some reason, I can just boot up to HDD2 and work away without any issues.
If the above cannot be done, what about a software where I clone HDD1 to HDD2 but if I makes changes to HDD1 for example adding a new application, windows updates or files it will update HDD2 automatically without having to reboot windows.
Thanks for any info or links to what I am trying to accomplish in either scenerio.