Thought I would add a comment I just posted to Spiceworks.
I have used Carbonite for years and installed on many clients' computers, as well as my own, and have been very happy with it until my own hard drive crashed. I added the mirror image backup component a year or two ago. When my hard drive crashed last week, I called tech support, followed the instructions, and went through a 5-6 hour process only to receive a message that it was unsuccessful toward the very end. The tech had said to try a different version of the image if there was a problem, so I did - two more times. I called tech support and the bottom line was there was nothing they could do ... probably because I have Windows 8.1 Pro. Most of my data is stored on a separate hard drive, so I still have that, but evidently Carbonite cloud backup was not backing up data on the C drive - probably my fault because I thought I had a mirror image of everything on it. The only thing I've really missed so far is a QuickBooks company file - and needless to say, I'm sick about it. I can't find any place on their website to indicate that it wouldn't work with 8.1. I would certainly recommend it for cloud backup, but beware of mirror imaging.
I have used Carbonite for years and installed on many clients' computers, as well as my own, and have been very happy with it until my own hard drive crashed. I added the mirror image backup component a year or two ago. When my hard drive crashed last week, I called tech support, followed the instructions, and went through a 5-6 hour process only to receive a message that it was unsuccessful toward the very end. The tech had said to try a different version of the image if there was a problem, so I did - two more times. I called tech support and the bottom line was there was nothing they could do ... probably because I have Windows 8.1 Pro. Most of my data is stored on a separate hard drive, so I still have that, but evidently Carbonite cloud backup was not backing up data on the C drive - probably my fault because I thought I had a mirror image of everything on it. The only thing I've really missed so far is a QuickBooks company file - and needless to say, I'm sick about it. I can't find any place on their website to indicate that it wouldn't work with 8.1. I would certainly recommend it for cloud backup, but beware of mirror imaging.