If you can find your serial number for mbx 5.0
You can use any 5.0 cd just inputting your number but you do have to be online!!to install!
Make sure your security is turned off or make sure a security program had not quarantined mbx 5.0!’
Avast actually did that to my mbx program!!
Had to uninstall avast to be able to get to my program!!
Terri at tech support Janome is awesome and very helpful!
Hope this helps!!
Kaye In la