I have a 12" 1GHz PB. My PB freezes up during all the usual applications: mail, safari, itunes, anything really. It did start after I installed, Crucial 512 MB ram, Apple Production Suite, Adobe Creative Suite, Microsoft Office 2004. I ran disk utility, reset pram, and daily/weekly/monthly maintenance. Do I have to reinstall everything one at a time, or should I send it to Apple Care? Any advice is appreciated