Why So Buggy?

[DomCobb1]

I'm editing my channel intro for YouTube, but it's nearly impossible since when I try to trim videos it always freezes and says Not Responding and then starts working again. It actually froze less on my worse computer. How can I fix this?

 

Specs:

Intel i7 3770 3.4ghz

8GB RAM

Nvidia GeForce GT640 1GB

1TB 720 RPM HDD

 

Edit: When I'm trying to trim in the perfect spot, as soon as I let go of the mouse, it freezes. So essentially, if I'm trimming the same video but I keep moving the trim, it freezes every time I make the video longer or shorter.

[DomCobb1]

just uninstalled and reinstalled, problem still persists.

[DomCobb1]

Also, it's also freezing if I do ANYTHING, such as;

a) Add a picture or other video

b ) Add audio to production

c) Click on pretty much everything