I'm not familiar with that ripper, maybe try SlySoft's CloneDVD - they have a free trial period.
Playback issues on the pc are frequently problems with the pc - is it an older machine? I had an old Emachines with a 667 Celeron and DVD playback was flawless, I also had a 1.1ghz Celeron in a DFI board and it couldn't play a DVD to save your life - always choppy. I later found it was a VIA chipset configuration problem and there was a freeware program to fix it.
Anyway, it sounds like a hardware problem on the pc.
Try using AnyDVD and CloneDVD - the are designed to work together, then try burning a DVD and see how it plays . . . my DFI board that couldn't play a DVD could burn one with no problems, so maybe you can luck out also.
Again, though . . . use QUALITY media or you wont know if you are sitting with a hardware problem or a media problem, so just eliminate the media problem to make troubleshooting easier.