1. Right click the file and select Properties.
2. Click “Security”.
3. Then Click “Advanced”.
4.Change the Owner from TrustedInstaller to User-PC\Users.
5.Click “OK”.
6.Select “User-PC\Users” and Click “Edit”.
7.Grant Full control permission to User-PC\Users.
8. Click “OK”.
Now you can delete or rename all those Files/Folders :)!!