If you compare microsoft's OS with any other Os, be it MAC, be it Linux, Unix, Sun, (make your pic), and you compare the stability of it, put all those OS through the same type of attacks.. load the same software on it, try and hack the same things on it,
To come up with that figure of 80%, a group of hackers (the same group that notified Microsoft 1 year before MS blast finally struck that there is a very dangerous flaw in their coding, but got ignored for over a year), set the task of putting the different OS's through the same tests, they tried to hack all of them, at various levels, attempted to crash the system by command only on all of them..... they just did a major load of tests and stuff on it all...
They came up with the figures of stability of all the OS's
There was no OS that rated 100% they all fell over at some point...
Unix lasted longest, Linux and Sun close behind it... guess who the loser was...
Windows XP only for a 67% rating on stability... after SP1 it rated 77%... after all the patches were loaded up to date (at the time of testing), it got 79% and at the time XP wa already over a year old. so according to me, 80% is a compliment of a figure.
Yes an OS is a big thing to test, but if other OS's can come close to 95% with no updates loaded, then i think Microsoft is VERY VERY slack with their coding...
Its also very interesting that most viruses and worms are ONLY attacking microsoft, the other OS's seem to be immune to them./....
So make up your own mind about what you think of microsoft, personally, i love them to pieces... the more the BETTER.