Windows 7: Need help with permissions change in registry

Trying to remove all of Acronis True Image 2011...used Revo, Acronis cleanup utility, and manual search of registry.

It's recommended that before installing ATIH2013...I should clean as much as I can of ATIH2011 from my PC.

Have removed scores of Acronis entries...but I have three left I can not get permissions set to remove...I usually have no problems with permission because of terrific previous help on "how to Change Permissions" in Win 7 Pro 64bit...but...I keep getting errors on this registry entry

Attached jpg shows issue....here's what I did step by step:

1) added Tim(Home_Desktop\Tim) to users
2) changed "ownership" to created Tim(Home_Desktop\Tim) owner
3) When I click on 'Replace owner on subcontainers and objects' permissions...etc...I then get the error in the jpg when I hit OK or Apply ?

Can anyone suggest what I am doing wrong and how to remove the entry in the registry prior to installing ATHI2013 ??

I have tried going to the end of the sub-entries and changing permission from there... ie. 'Properties' but always get errors ?

Thanks...TRinAz

Never mind....not sure how I did it but I was able to clear ACROVBUS (last Acronis 2011 entry) from the CurrentControlSet and after restarting...it's gone from 1,2,3 sets also

Seems I had to find the very 'lowest' entry that I could change permissions on first toward the end of the entries...then just go up the ladder to ACROVBUS itself...

TRinAz