I am just starting to learn about video editing and would like some advice on what program to use to edit
HD WMV and MP4 videos. I tried powerdirector 10 deluxe but it is very slow.

Currently using:
ASUS G74SX-BBK9Intel 2nd Generation Core i7
2.0GHz (with Turbo Boost up to 3.1GHz)
Nvidea GTX 560M Graphics Card
16 GB Ram

Thank you very much.