Shutdown Problems etc. with MBP

Hey Everyone,
My refurbed MBP has been having problems recently. I will be going along doing my business and the screen glazes over in grey and I am given a message telling me I have to restart. Upon restart, I am told that OSX shut down and needed to restart once I get to the desktop. Here's a log of when it does this and what I'm doing when it happens.

04/30
05/01 - 11:30 am
05/02 - 10:45 am, 10:18 pm
05/04 - 12:30 pm
05/05 - Restarted when closed for sleep
05/06 - Dock failed, iWeb couldn't find Spellchecker, trash wouldn't empty
05/06 - 11:15 PM, opening Dashboard
05/07 - 9:23 AM, watching stream vid
05/07 - 10:58 PM -loaded "Get a Mac" ad
05/08 8:50 AM - While transferring files to external HDD
05/08 9:30 - Opening Safari

Additionally, some of my iLife apps are flipping out too. iWeb shuts down randomly whenever I try to scroll through the photos in the Inspector. iPhoto does the same thing when I scroll through photos. Safari will shut down at random three times in row and then grey screen.

I put Bootcamp on the HD right when I got it mid April. I recently added a Logitech VX revoluition mouse into the mix. Other than that I can't think of anything that has changed software wise. I'm taking it into the Apple store this afternoon but I thought I'd get your opinions first.

Thanks,
Aaron

 

That's a good idea. I'll try that. In terms of care, I've treated it like a newborn.