Hmmmm,

That is probably not the only bit of malware that will cause a problem................ it would seem that Microsoft don't test their products on infected machines?

I have always argued in favour of "reference machines" so you test new stuff and updates before rolling them out. It doesn't have to be top of the range kit either, as you are only looking for compatibility issues?

I think that this is particularly important if you have obscure and/or legacy applications as you can be pretty sure that MS won't have tested with them.

So far I have not heard of any issues in this part of the World.