Windows 10: Registry - Could not open key

I'm trying to install Autocad and part way through I get a message saying it could not open a Key. I've googled the issue and believe i need to change permissions in registry which i tried to do as shown below but without success.

Am i adopting the correct approach and what do i need to do to overcome the issue?

Thanks





From various searches i gather that i need to change the permissions. This is the key in regedit.





Right click on Reg file and go to permissions.





I then change all that i can to full control and go to advanced and tick "Replace all object permission entries..............."





Then get the warning




Then get the message that it can't be done.




:)

 

Modded Registry. Want Old Back....

did you try this

To restore the registry
Open Registry Editor.
Click Options, and then click Print to print these instructions. (If you are using the Help and Support Center, click Print above the topic area.) They will not be available after you shut down your computer in step 2.
Click Start, and then click Shut Down.
In the list, click Restart, and then click OK.
When you see the message Please select the operating system to start, press F8.
Use the arrow keys to highlight Last Known Good Configuration, and then press ENTER.
NUM LOCK must be off before the arrow keys on the numeric keypad will function.

Use the arrow keys to highlight an operating system, and then press ENTER.
Caution

Incorrectly editing the registry may severely damage your system. Before making changes to the registry, you should back up any valued data on your computer.
Notes

To open Registry Editor, click Start, click Run, type regedit, and then click OK.
Choosing Last Known Good Configuration provides a way to recover from problems such as a newly added driver that may be incorrect for your hardware. It does not solve problems caused by corrupted or missing drivers or files.
When you choose Last Known Good Configuration, Windows restores information in registry key HKLM\System\CurrentControlSet only. Any changes you have made in other registry keys remain.

 

Can NOT remove ATITool registry key!

It's low priority to stop ATITool from making undeletable class keys in the reigstry?

That's about one rung above spyware.

What bothers me most is that I'm pretty sure you can't protect a registry key by any simple means, something must still be running somewhat that is protecting that key. Even after I manually removed the service. That's what bothers me.

 

ATITool registry key

Hello,

During ATITool installation, the following registry key was added to my registry:

"HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{85b5ddd0-e090-4b15-bdf2-a443a3ca0b66}"

After uninstalling the program, this key remained. I tried to delete it through the registry editor but it returned the following error:

"Cannot delete {85b5ddd0-e090-4b15-bdf2-a443a3ca0b66}: Error while deleting key."

I'm running Vista Home Premium 32-bit by the way. I also tried to change permissions for the key and deleting in safe mode, but neither of those worked either.

Any ideas on how i can remove this key? Any help is appreciated, thanks.