What is the version number as found under Help, About?
. . . . Hardware setup: wich information do you need? . . . .
See this topic for what is required and please quote processor and graphics card make/model in full, and also what monitor/screen resolution(s) you are working with if this is a laptop.
I would suggest you put this information in your profile signature so we do not have to keep asking for it.
What is the video format, resolution, and encoding ? Download and install MediaInfo and analyse one of the clips and post the results, see this tutorial on how to setup MediaInfo and analyse a video clip for all the data required.
The amount of free space on the hard drive(s) you have.
A screenshot of the Program settings, Device options tab would also help.