Well I guess that I'm high then. I never once have to reboot my laptop while at work, running Outlook, Word, Powerpoint, Firefox, IE, and a couple dozen SSH windows. I generally have about 18 windows open all throughout the day, and it *never* locks up.
*ALL* computers have issues. I manage servers for a living (UNIX - Solaris, HPUX, AIX, RedHat, SuSE, etc) - there's no such thing as a computer that never has a problem.
I'd say that 95% of issues that people now attribute to Windows are either a hardware issue (incompatible, or starting to fail - there's a reason Apple refuses to let anyone easily install OSX on their own hardware), or are caused by the end user (most likely browsing to a site they shouldn't be and getting some sort of malware). Yes, PCs are more suseptible to Malware, but like was said before, it's not because they're generally more vulnerable (well, IE might be...), but because there's more things written to attack them.