[Inferno]

What would cause a permission denied error on a book that worked before?

I fully checked my drives with manufacturers drive test software and there are no errors other than being due for a defrag.

I know that one of the books giving an error was accessed previously because it was in my "android named" library and had my quality tag filled in.

The book was not open in another program. My user has admin rights and I am the only user on my pc.

When I am reading a book using the calibre built in reader is there any situation where exiting via a "shutdown" will leave the book "open" to calibre? I know I had a book or three open when we had a power outage last week.