Only one of this kind of scheduled-imaging program can be installed at any one time. This isn't anyone's fault except maybe Microsoft's. I've experimented with ShadowProtect, Acronis, Paragon Drive Backup, etc. - only one can be installed at a time. You simply can't have two installed at one time. If you want to find out if one is better than another, then the ONLY way to unistall the one you aren't testing.
You could have uninstalled Acronis and then reinstalled it (if you wanted to) in much less time than you spent in trying to make these partial fixes.
In summary: if you want to test ShadowProtect you MUST uninstall Acronis TrueImage. End of story.