Re: So since Microsoft are not concerned about the security of windows,
"
Which under UK law would be illegal. It must be 'fit for purpose' and trying to disclaim that may well be a criminal offence under the Fair Trade Act.
"
Sure, but does having a vulnerability for a very small subset of malware mean that it is "unfit for purpose"? And if so, is it the OS or the antivirus software that is "unfit"?
Does the fact that your car is vulnerable to a determined saboteur (who could e.g. crawl underneath and cut your brake lines) make your car "unfit for purpose"?