Cleaning Up CSC Folders

C:\Windows\CSC folder is the offline files folder. It has special permissions. Without the correct permission, you won't be able to delete anything in it

To delete the content of C:\Windows\CSC, you need to modify its permissions

> cd c:\Windows
> takeown /f CSC /r /a /d y
> icacls CSC /grant Administrators:F

Then you can navigate to the folder and start deleting files