Windows Longhorn build 4051

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6.0.4051.idx02.031001-1340
Build of Windows Longhorn
6.0.4051.idx02.031001-1340
OS family
Architecturex86, x64, IA-64
Compiled2003-10-01
Timebomb+180 days after original install date
Works in
About
WindowsLonghorn-6.0.4051-About.png
SKUs
Professional
Key
TCP8W-T8PQJ-WWRRH-QH76C-99FBW

CKY24-Q8QRH-X3KMR-C6BCY-T847Y (x86)

P9BT8-6HBG3-GRF29-BM92B-M973D (IA-64)
TCB.png TCBGallery.png

Windows Longhorn build 4051 is a Milestone 7 build of Windows Longhorn and the build given to attendees of Microsoft's Professional Developers Conference 2003 in Los Angeles, California, which was held during the 27th to 30 October of that year.

This build comes in x86, x64 and IA-64 variants. The x64 version is not overly different from the x86 version, but it has a new setup style and several apps including Internet Explorer 6 have been optimized for x64 (often, the x86 versions do not run).

The Checked/Debug version was previously known to be not working in hypervisors; it will simply refuse to load setup due to a bugged processor check. However, BetaArchive user WindowsNeptune later found a fix to run the x64 version. It is also noted that this version does work fine on a physical system with AMD processors that contains the 64-bit AMD64 instruction set. [1]

This build was compiled in evaluation mode, and can be installed on the current date, but once the timebomb is triggered, Windows won't let you access the desktop.

Setup[edit | edit source]

Although setup overall is similar to previous builds of Longhorn, you cannot upgrade to this build from a previous build of Longhorn, due to this being a PDC build.

New features and changes[edit | edit source]

winver.exe banner[edit | edit source]

  • A new winver banner has been added.

Explorer[edit | edit source]

  • New Documents and Photos and Videos libraries.
  • The prefix "My" was dropped in most of the remaining folders, resulting in new names for locations Computer, Network Places and Contacts.

Buddy matchmaker[edit | edit source]

This build of Longhorn includes an early version of Buddy Matchmaker, labeled as "Play A Game With Friends".

Internet Explorer[edit | edit source]

Internet Explorer 6.05 included an add-on manager, a download manager, pop-up blocker, and a tool to quickly delete browsing history.

Other new features and changes[edit | edit source]

  • A new TCP/IP stack. IPv6 is also enabled by default in this new stack.
  • Self-Healing NTFS was added in this build.
  • The top buttons in the migration wizard now function.

Do note that the x64 version of this build lacks the Sidebar.

Bugs and quirks[edit | edit source]

Notifications[edit | edit source]

Notifications tend to re-appear quite a lot, until you reach a certain point where they'll finally close for real upon closing. To fix this, disable the Sidebar or click on Options, and then click on "Don't show this again".

TCP/IP stack[edit | edit source]

The TCP/IP stack has a few bugs, however, most of them were fixed in build 4053.

Gallery[edit | edit source]

PDC 2003 discs[edit | edit source]

References[edit | edit source]