Windows NT 3.5 build 388

Windows NT 3.5 build 388.1 is a mislabeled, partially corrupted and incomplete copy of Windows NT 3.1 build 404. It was uploaded to BetaArchive by Cross0210 on 2 May 2008 and remains widely available online.

The exact origin of this bizarre mislabel is unknown. Due to its broken state, it tends to crash during or after installation.