Try option 2 and 3 in this tutorial Windows.old Folder - Delete in Windows 10 - Windows 10 Forums
The real solution would be to sort out why on earth windows is still loading a driver that it has previously consigned a folder specifically designed for archiving an old system you're not supposed to be using any more!
The driver is usually the Intel Display Audio driver. Disable it in Device manager, take ownership of the Files, delete them, clean out the Recycle bin and re enable the driver in Device manager. Or, you should be able to Take ownership and delete them in safe mode and empty the recycle bin.
We still haven't heard back from the OP, and until that happens we can't accomplish very much.
As for why it works that way, I have no idea. Microsoft would be the the only one who does, as far as I know.
Here's what I have done:
1. renamed them
2. tried many times to delete them (or some of them).
3. removed "trusted installer" as the owner and gave it to me
4. placed my user id and "users" as the only two that could do anything with the folders and given both all functions.
I do not remember what the folder names are and who had what permissions! This is where I am at. Please see above!
Please try the options in this tutorial Windows.old Folder - Delete in Windows 10 - Windows 10 Forums
If that does not work. This is how to take ownership of files Take Ownership - Add to Context Menu in Windows 10 - Windows 10 Forums. Then Try what is posted in Post # 15 above.
1. Go to device manager and disable the Intel(R) Display Audio Driver, if you have it.
2. Go to the Windows.old folder and take ownership
3 Delete the Folder.
4 Empty the Recycle Bin.
5. Go back to Device Manager and enable the same driver you disabled.
Okay option 2 kind of worked. I ran
==> attrib -r -a -s -h c:\windows.old /s /d AND
==> rd /s /q %SystemDrive%\windows.old
the 1st command worked fine and the 2nd gave 100k+ of access denied
Then, I ran Disk Cleanup which had not done anything before. Then I ran "Clean up System Files" which also had done nothing before.
And now this time "Clean up System Files" deleted one of the folders. HIP, HIP HOORAY!
Then I renamed the other folder windows.old and ran "Clean up System Files" and it deleted the 20 Gig folder. WOW!!!!!
Thanks Kind sir, THANKS
Sometimes going old school does the trick.