According to the statistics that you quote it would leave about 70% questions which is actually much more than I thought. I just wonder why there is so strong opposition to a Windows specific site even though there are sites dedicated to Mac, to Unix and Linux, even one dedicated to Ubuntu. For programmers there are Stack Overflow, Programmers, Code Review, Code Golf, Computer Science, Theoretical Computer Science, Computational Science, Server Fault, IT Security, Cryptography, Webmasters, Web Applications... Why Windows that is so popular shouldn't have one? I got voted down for even asking!

@SEARAS I actually agree with you but there is a separate site for Ubuntu, even though there already is a site for Linux, and then there's Super User which also has question about Linux, so any Ubuntu user already needs to have not 2 but 3 sites open - and that's if he's not a programmer, in which case he needs to open: Server Fault, Stack Overflow, Programmers, Code Review, Code Golf, Computer Science, Theoretical Computer Science, Computational Science, IT Security, Cryptography, Webmasters, Web Applications - those are all separate sites. I wish there was a one site to aggregate it all.