Igor, I have the same problem of Tony… I could not imagine it was related to avast! so I did not report it before… I suppose just from version 4.1.280 but I’m not sure… The floppy could only be read at the second time if you previous use a file (access, read, write, etc.) and then close the file and change the floppy to another…

The user can use Windows Explorer with no error but with MS Word or Excell, for instance, changing the floppy brings a I/O error! Of course, the previous file opened was closed before changing the floppy :cry: