My finder has been going very slow and doing weird things. I try to click on something on the left side, for example the Macintosh HD button, and I get the beachball for a while then it opens up. Also, there's a file in there I can't delete. I try dragging it and it goes to the trash bin but... It comes back into the same place. I ran Disk Utility and verified the disk and got this message: WTF is going on. I bought this in August 2007.