Windows 3.0 RC6

Windows 3.0 RC6 is a Release Candidate build of Windows 3.0, which was scene leaked at some point in early 1990. It was found again and uploaded to BetaArchive on 2 June 2015. It was mistakenly labeled as the RTM version ("Production release") by whoever leaked it originally. However, this build is 1-2 months earlier than the RTM and has several differences in various files.