Windows Longhorn build 4030 (main)

6.0.4030.main.030626-1414
	Build of Windows Longhorn
OS family	Windows NT
Version number	6.0
Build number	4030
Architecture	x86
Build lab	main
Compiled on	2003-06-26
Expiration date
Timebomb	2003-12-23 (+180 days)
SKUs
	Home Edition; Professional
Product key
	TCP8W-T8PQJ-WWRRH-QH76C-99FBW
About dialog

Windows Longhorn build 4030 (main) is one of the last Milestone 5 builds of Windows Longhorn. On 23 January 2020, this build was listed on a thread by UX.Unleaked blog founder Grabberslasher to be released to BetaArchive's FTP server, and was released in the eleventh set of his 33 Longhorn/Vista builds on 3 February 2020 in the Home Edition and Professional SKUs, along with Windows Vista build 5808.

It was compiled several days before its Lab06_n counterparts, which were respectively produced on 30 June 2003 and 2 July 2003. It is the earliest currently publicly available pre-reset build of Longhorn to feature the Home Edition SKU.

Bugs and quirks[edit | edit source]

The color depth is set to 16-bit by default, rather than 32-bit.

Desktop Compositing Engine[edit | edit source]

The desksrv.dll implementation is incomplete, which results in the Desktop Composition Engine to not produce glass borders, with it instead downscaling windows and causing display glitches. sbctl.exe has many parameters for controlling the DCE, although only the wmgstart and wmgstop parameters function correctly.