dropped frames?

When capturing busy shots (e.g., wide angle pans, running water) the shots are perfect on the cam, but herky-jerky on the computer. I'm using Ulead Video Studio v. 9 on an HP with P-4 2.4 GHz and 512 Mb RAM. Is there a workaround for this problem? Or do I need to use a more powerful machine? If so, what specs should the new machine have?

Are you capturing to your C: Drive, try capturing to seperate drive if you have one and see if that helps