Hello there, so I had format my hard drive and reinstall snow leopard (boot camp issue). Everything went fine and I've been using it for almost 4 weeks now. One very annoying thing I noticed though, is that when I switch from one wireless network to another (we have 2 different ones in the house), it sometimes prompts me to enter the password again, although I always have the button checked "save password". This doesn't happen every time I switch between networks. Maybe 1 out of 4 times. And sometimes it happens when I restart my MacBook Pro. I have been using my MacBook Pro for 2 years and never happened before, only now after reinstalling Snow Leopard. Edit: Yes all the software updates have been installed.