Hi guys!

I've been experiencing one fairly annoying problem since I got this iMac..

I'm running an iMac 27'', 2.86 GHz Intel Core i7, 8 gb of RAM, on OS X 10.6.4.
The problems occur in Photoshop (every time I change grouped tools it freezes for about two seconds), in Illustrator (every time I click on any object it freezes the same) and in Adobe Acrobat Pro whenever I select any text inside of pdf document.

It's all CS5 version. I also tried installing one CS4 version to see if it's because of the installation, but I get the same problems in CS4 also..

Tried reinstalling OS, still the same.

I dont know what to try anymore so if anyone has any kind of suggestion on what to check, please help!