#nanoff installation result to System.IO.IOException
1 messages · Page 1 of 1 (latest)
The error message suggests the file is being accessed by another process. Close that process or reboot and try again would be my suggestion.
I've done a reboot many times.
So then you'll need to investigate what has that file open. Here's a link from Google that might help https://serverfault.com/a/1980/34183