I use 98. I had problems with render to disc, but they cleared up after installing the microsoft mapped drives patch. But now the problem has come back. I render to disc and it gets to 100 percent, then the program locks. On restart I get the option to save the interrupted render, which I do. I get a perfect image saved BUT there is no glow on glowing materials. Anyone else notice this??? Also open gl worked fine, and has suddenly screwed up, for no apparent reason.