found below solution on the net can offer no guarentees it will work but may be worth a try
In Safe Mode, right click on the file and select "Cut". Answer "Yes" in the dialog that asks if you really want to "cut" this write-protected file (or something like that...). Paste the file in a temporary folder ("C:\Temp" for example). Now, right click on the file and select "Properties". Remove the "Read only" attribute and click "OK". Now, delete the file!