You have to go to the registry and go to [HKEY_CLASSES_ROOT\CLSID\{B98A2BEA-7D42-4558-8BD1-832F41BAC6FD}\Instance\InitPropertyBag]. The problem is that Acronis took ownership of this location keeping you from updating the key. Follow the steps below and it will allow you to make the required changes.( taking ownership ) I went to that key and successfully took ownership...
1. Click on key and select properties.
2. click on "advanced"
3. select "owner tab"
4. change "System" or "Trusted Installer" to yourself "Name Administrator Blah Blah" Click Apply... OK
5 Back at original "permissions screen"... click on the name you just selected and "tick off the check box" to give yourself "full control" Sometimes it even appears "Grayed out"... you can still check it off.
6.That should do the trick
7. Now change the ResourceDLL to "%SystemRoot%\System32\sdcpl.dll"
8. Finally change the ResourceID to "14" Hex.
Or look here: http://forum.acronis.com/forum/14782#comment-62273
This is only why to fix this, unless you created a restore point before installing Acronis. When you uninstalled Acronis, Acronis did not set the ResourceDLL to "%SystemRoot%\System32\sdcpl.dll" or the ResourceID to "14" Hex. It was left point to the Acronis program.
Uninstalling Acronis True Image 2011 disables Windows 7 backup, even if one enables Windows backup before exiting and then uninstalling True Image. There are complaints about this on Acronis forums, but Acronis seems to have little interest in fixing the problem and there seems to be no way to contact them directly. Apparently a fix requires editing the registry, which I am reluctant to try. I'd be grateful for help.
In the meantime, DO NOT INSTALL THE TRIAL VERSION OF THIS PROGRAM! If you do, you will not be able to revert to Windows 7 backup if you decide you don't want it.

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