Could the ones who experienced this issue try if choosing cyberlink dvd navigator
(you need to have Cyberlink PowerDVD 7.x installed, PowerDVD 8.0 does not work) solves it ?
Go to Control Panel/Administrative Tools/Computer Management/Disk management. Right click on the drive panel you wish to assign a re-mountble drive letter of folder name to. From the right-click context menu, select 'Change Drive Letter and Paths'. The click on 'Add" in the dialog wndow, and when prompted mount to a folder in C drive. Create a folder say 'DVD movies Drive' in you C drive via Windows Explorer and use that for your mount.
Then you can use this folder with MP and all Rips will play fine!