I turn to you, dear MR members, because I don't want to hand my MacBook Pro over to the IT department for an undetermined amount of time. I'd like to have some solid theories first. I have a 2.16 GHz Core Duo MacBook Pro with 2GB of RAM issued to me by my company. This is an important point: I run the exact same software on this machine as I do on my two personally-owned Macs (a new AL iMac and a 2.0 GHz Core Duo MacBook), with three exceptions: Lotus Notes (which I don't use); Adobe CS2 (instead of CS3 I have at home); and whatever secret mojo they have installed to get OS X to talk to our Windows domain servers in the proper way. Here's the problems: first, the thing won't shut down. Ever. If I tell it to shut down or reboot, it closes all apps, closes the Finder (so all I see is the desktop background), and then just stops. It doesn't matter if I let it sit for 30 minutes; the only way for me to shut it down is to hold the power button down. It has been doing this since pretty much since it was issued to me. Second problem: randomly, apps won't load. Sometimes it's Adium. Sometimes it's TextMate. Sometimes it's Mail. The other morning it was Terminal. They just bounce in the dock for a second, then lock up and I have to force-quit. The only way to get them working is to reboot, which brings me to my third problem: I can't start up reliably. It will hang either at the login screen, or when the desktop is half-loaded (I have the menu bar and spotlight icon, but nothing else). I have to hard-reboot it until it boots up fully. The other morning I had to do this six times. My theory is that since it's so random, and it's happening to so many apps, it might be hardware related. This is a first-gen MBP and it has the hissing/whining logic board (getting things replaced around here doesn't seem to be easy). I'm wondering if it could contribute to system instability. But before I go through that nightmare of giving up my work computer, which I can't really do for awhile because we're so busy, I'd love to know if any OS X ninjas have some other ideas I can try.