I have been using Debut for a year or so now, but just recently screen capture recordings have developed a stutter on playback. They run smoothly for a while, then it stutters, then smooth, then stutters. The smooth periods are shorter than the stutters. I imagine this is caused by slow disk writes causing the buffer to overflow and lose frames, but I have no idea why or how to fix it.
I've tried reducing the frame rate to 20fps, and putting Norton 360 in silent mode, to no effect. I am using Debut on a Windows 7 64-bit laptop, with 6GB RAM, Intel i3 2.4GHz processor and currently 180GB free disk space.