OK first things first... how long ago did you first used the program ? if it has been over 30 days then the trial period may have expired.
The pest way to convert to any other format is to first copy to your hard drive and the convert the files that was saved to your hard drive, this will save wear and tear on your optical drive/drives plus eliminate any bottle the process may have on your system.
Since doing conversions require a lot of CPU resources it is also a good idea to stop any programs you may have run by you or in the background by the system itself.
There are many different conversion profiles and some are better then others, so check your manual for your EHD to see what video formats it supports.
Edit just noticed you stated it gets to 5% so your still using the trial