midi devices dissapear


I am running Cubase LE 7.0.80 32 bit on Windows 8- 32 bit.

When opening a project , I get an error message “Missing Ports” .

This is because midi devices installed in Cubase, connected to these ports, have dissapeared.

in the MIDI Device Manager, previously installed devices are gone. Sometimes a few are missing, sometimes all the devices are missing.

My workaround is to use the “Import Setup” option, to import a XML-file with all the settings, but it should make a big improvement if this issue is solved.