Hello my name is***** and I would be happy to try and assist you with this.
Windows 10 is still very new and many of us are still experimenting with it to learn the ins and out of the system. However, I hope I can offer you at least some help with this. You never said which operating system you upgraded from. Is it 7 or 8.1? Also, I assume you were using the built in Windows backup software and not a third party program. The issue you might be having is that Windows 10 uses a different backup process then Windows 7, and if you are using the same drive still there could be some sort of conflict going on. If you are not doing so already, I would use the Windows 7 version of Windows Backup that is still hidden within the OS. To find it, type in the search Backup and Restore and choose the one that says Windows 7.
Let me know if this is of any help.
Thank you for getting back to me. The way I read your question I assumed you were using the built in Backup utility.
There still could have been an issue due to the upgrade from 7 to 10. I've experienced a lot of weird glitches and problems when upgrading from 7 to 10 also. Windows 10 is so new that there is still a lot of bugs in it. I find the operating system runs a lot better if you do a clean install. This way you are running pure Windows 10 and there aren't any after effects from Windows 7. You will need to make yourself a USB or DVD and boot your computer to one of these devices to do a clean install though. You can download the Media Creator program for Windows 10 to get an ISO or to make a bootable install disc.