Last time I went to NHS clinic was to get some travel shots; their machines were down with a postit notes on it saying “Don't Start the Machine - Virus Alert”. It was the SQL slammer time when someone didn't apply the patch. (Easy to blame Microsoft for not applying a software update which has been available from Microsoft six months ago [Gartner Editorial]).
Today I read this:
Microsoft Makes Deal with British Health Department A "landmark agreement" between Microsoft and England's Department of Health to renew the agency’s license for desktop products could save it an estimated $608 million. Microsoft also will invest $74 million to develop health specific software applications to improve patient care.
Aside from popular speculations of Open Source taking over Europe euphoria, not many desktops run SuSE out there. Windows is (the most) popular desktop & prominent business platform and .NET framework is very much liked development environment/methodology, at least from the software houses / ISV's I know and expos and conferences I've attended; London Stock Exchange is a prime example of it.
Software development is evolutionary process; vulnerabilities are found and patched. It’s a part of process and those who don’t like the innovation, can keep their stock pricing at 4.49 as long as they want.