I lost my registration info a while back. I ran the drives through a series of tools/diagnostics in Norton SystemWorks. I don\'t know what caused it, though it could have been the defrag. Word of caution, only clean up your HD on weekdays during the times when GS registration support is avaialble.
This happened to me too when I used norton\'s speeddisk. The problem with using windows\' defrag is that it doesn\'t do the job well, plus it runs for the whole day. compared to several minutes. I now have the system\'s partition on C, then install gigastudio on D, and have other drives for gigafiles. So this way I can defrag my systemfiles, and giga files but not mess around with gigastudio program files.