looking at pc sales and then saying that windows 8 killed them is wrong.

now look at sales of windows 8 and windows 8 devices and at sales of windows 7 might have some more meaning....

but you have to also take into account the sales trends, if new pc's sales has been going down for a while then there is no way a new os will work wonders and reverse the trend over night.

but in general I do see a lot of problems with what MS did...  but they had to do something.