Lol, I've been having crashes with base Windows software such as explorer! Yet, games and other software in which I've installed myself, I have no problems! Sometimes Windows forgets to recognize itself! Lol, but, boot times are still excellent!
Internet Explorer was crashing on my notebook, then I realiced it was because I had the Skype IE plugin installed. Actually, when I was installing Windows 7 it told me it could have troubles with Skype.