I get a file in use message telling me that the file is locked ?
 

This is a one user computer and the file is not being used. The box
containing the error message says "FILE IN USE". If I reboot I can get into
the file once only before having the same error message. I have tried saving
the file under a different file name but that file acts the same. I have
checked permisions and that is not the problem either .....HELP!