Your laptop may not have enough memory. It doesn't matter if you use an old processor, but lots of memory is crucial. Voice-recognition programs are memory hogs of the highest order (regardless of whatever the software says on the box about
the memory requirements).
I recommend at least 1.5 GB of RAM if you are using Windows 2000 Professional with voice-recognition, and at least 2 GB of RAM if you are trying to use it with Windows XP. Don't know about Windows Vista, but I will be installing it shortly, and can then report. I use a desktop computer that I built myself because it was the cheapest way to get massive amounts of memory capacity for the money. RAM for laptops tends to be pricey, so companies skimp on that, and load up the products with a lot of other junk instead. (Okay, I'm prejudiced, but I don't want to watch movies or listen to music on my computer, I want to get work done.)
Anyway, I hope you have a chance to try the software soon.