I am running on a Dell Optiplex 720, AMD Athlon 64 x2 Dual Core 4200+, 2.00GB RAM, 204GB free space, on Windows XP Pro w/SP3. The DVD drive is a TSSTCorp model TS-H653A. I can burn files to DVD using Roxio just fine, and in PowerDirector when I go to Create Disc, Burn, and just create the file without burning to disc, it still also hangs at 21%. My project contains several MOVs, MPGs, and MP4s, and I can play the entire project through inside PowerDirector.
So I'm thinking it is a setting somewhere that needs to be changed or it's a bug in the program. Let me know what else I can look at, otherwise I will be requesting a refund for the program and the unhelpful technical support.