I've been using VRD since Pentium 4 days, but I haven't used it much in the last couple of years, although I have kept the installed version up to date. Today, when I started it, I was advised to update to the latest version, which I did. When I loaded an MP4 file and tried to edit it, the sliders are "sticky", is the the only way I know how to explain it. They have always been very smooth and easy to use. The problem seems like an underpowered computer, but I'm using an i7-3770 with Windows 7 and 4GB of RAM and an NVIDIA GT610 graphics card. Am I doing something wrong?