Haven't tried it yet, just making note
https://issues.apache.org/bugzilla/show_bug.cgi?id=51078
more win related issues
https://issues.apache.org/bugzilla/show_bug.cgi?id=51079
The second one looks really interesting. I didn't do detailed examination, but at the first sight it looks to be on the right way to finally be able to run PHP under different user accounts on Windows. If so, it gets at least triple WOW! from me. :)