There is a known issue with the Quality Agent in Creo 2.0 M200. This has been reported to the PTC R&D team, and they are working hard on finding a solution. In the meantime, the academic download page has been rolled back to M170 in an effort to get around the error.
If you are having an issue with the M200 version of Creo 2.0, I would recommend uninstalling and then installing the M170 version found here: http://www.ptc.com/appserver/auth/it/esd/academicFree.jsp
Thanks,
Chris