yes it will work ! I updated becasue of problems caused by a power outage . I was unable to access my webpage of webmail and decided that now would be a good time to update . I preformed a backup ( which I later found out it even kept the messed up setting for my webpage and webmail access so yet again i did not have webmail access)to my desktop and updated the system verified that my webmail and webpage access was okay and then did a restore and it worked but was doing the exact same thing it was doing before the upgrade. So as long as your system is in tip top shape when you do your backup you should not have any issues