Unable to Delete Program Key

[Guest]

I've tried repeately removing a program key from Local Machine, Software.
Using RegEdit, as Admin with all permissions (including "Full Control), I
keep getting the following error msg: "Cannot delete Acronis: Error while
Deleting Key." I exported the entire Software section and edited out the key
in Notepad and imported it back, but the old key (and subkey) is still there.
All other keys/subkeys, and related elements, of the program were
successfully removed. Thanks for your suggestions!

 

[Thorsten Matzner]

I've tried repeately removing a program key from Local Machine, Software.
Using RegEdit, as Admin with all permissions (including "Full Control), I
keep getting the following error msg: "Cannot delete Acronis: Error while
Deleting Key." I exported the entire Software section and edited out the key
in Notepad and imported it back, but the old key (and subkey) is still there.
All other keys/subkeys, and related elements, of the program were
successfully removed. Thanks for your suggestions!

Start to the Safe Mode and retry from here.
"A Description of the Safe Boot Mode Options in Windows XP"
(http://support.microsoft.com/?kbid=315222)