Finder freezes/stucks

Usually when i try to open a new window of the finder (checking my USB, files, etc..) the finder freezes (with a beachball) or crashes, so i have to reset it.

I have OSX Lion with all his updates (10.7.1), all apps from store also updated, so i think is related to Lion because in Snow Leopard i never experienced this. My system is a Macbook Pro 2010 15'' Core i7 2.66ghz, 8GB ram and a 128GB ssd (Samsung 470). I dont think is related to low ram or performance because i have like 4-5gb ram free except when i work with Photoshop, VM or Starcraft 2.

Seriously they need to resolve some bugs with the system because in SL i never had this type of problems, and usually the boot/shut downs take a lot to load (white screen and like a minute waiting to turn off, only a comment: i almost never use reopen windows when i shut down.

Greetings!