Windows Vista build 5203 (winmain)

Windows Vista build 5203 (winmain) is an unleaked build of Windows Vista. Reportedly, this build was flighted to external beta testers prior to the official release of Windows Vista build 5112, the official beta 1 release. Screenshots were posted on the website "Anyweb.Kicks-My-Penis-And-Ass" in July 2005.

Despite having a higher build number, the build tag for it is still "Microsoft(R) Windows(R) Codename Longhorn".