I am posting this here because I noticed in the thread shown below that a member suggested not trying to save a backup to an older computer.
I have a small workgroup network with 1 win10 machine (recently upgraded from win7), one win7 machine and a seagate central NAS. I have been saving system images to my NAS for several years with no problem. However after I upgraded one machine to win10 I can not save a win10 image to the NAS. I can save an image from win10 to win7 ok but cannot save image from win10 to NAS. I am able to save files from win10 to NAS so it is just the image save that is the problem. I continually get the error "The process cannot access the file because another process has locked a portion of the file".
When I save a win7 image to NAS it creates a .vhd file successfully. When I save image from Win10 to win7 it creates a .vhdx file successfully. The win10 to NAS creates a .vhdx file but fails then deletes the file. Even if I disable SMB2 on win10, the backup still creates a .vhdx file then fails. I have lots of procmon and netmon traces that seem to show the problem but I don't know how to parse that info to figure out why it is happening.