Why?
"The Register is good IT news online but always criticizes Microsoft"
Because they deserve it? They make inferior products, then use a combination of momentum and illegal business practices to try to force competitors out of the market. (Recall they have been multiply convicted of anticompetitive business practices.. and done many other greasy things they have not been charged for.) They do give Microsoft credit when they do something right.
There are plenty of magazines and websites that praise everything Microsoft will do and has ever done (and are revisionist, claiming Microsoft invented the internet *or* that they invented the web browser, that Microsoft "brought PCs to the masses", that if it weren't for WIndows everyone would still be using a command line (ignoring the several other GUIs in development at the same time as Windows), and other untrue statements.). So the reg just takes the piss out of all that a bit.


