Arrrrgh. What's with Firefox + Win7?

Okay, this is really annoying.

I have this *huge* computer, able to run the latest graphic-intensive games.

I can spring WoW to life within seconds, I've got a *powerful* quad-core CPU, I've got 8 gigs of RAM, I'm pretty good to go, I'd think.

But wait... here's Firefox.

Some reason, when I double-click Firefox's icon, the thing is instantly there. Cool. But... wait. The thing just sits there, for 20+ seconds, and won't let me click on any buttons? I can mouse over the UI elements on the screen and nothing happens? I can click anywhere in the window and it is basically a dead window, until about 20 seconds later before it starts responding?

Arrrgh.

Firefox never did this Pre-Win7... I'm not sure why it is doing it now. *Nothing* short of graphic-intensive games takes no 20 seconds to load. It is a freaking HTML web browser, there's no _reason_ it should take 20 seconds to load something that simple by today's standards.

And the kicker is, I can already have a Firefox window up, open another and it, too, refuses to respond to anything for nearly 5-10 seconds, even though I already had a copy of it running (usually, it'd pop up quicker if you already had one running).

I'm not really running anything in the background, and none of my other programs do this. I've loaded larger, more CPU-intensive apps faster than this, so I don't get what's the deal with Firefox....

As far as Addons, the only two I run are AdBlock and NoScript... and I have the home page set to the default: Google.