Merge r536052, r556879, r557188 from trunk: Add detection for post XP operating systems. Think this can be safely backported to 2.2 and 2.0 branches ApacheMonitor valid OS is any WIN32_NT version. Simplify OS detection. We are only interested in NT and WIN2K+ (so we can use services.msc) Submitted by: mturk Reviewed by: jim