Windows Longhorn

"Longhorn" was the codename for planned successor of Windows XP. The project was cancelled, and replaced with a new project with similar codename - Longhorn Omega-13, that was renamed to Vista that became the real successor of XP. Early Vista's builds were reffered as just Longhorn for most of the time and those two projects were often mistaken.

Builds

This list contains builds compiled before the development reset. For post-reset builds, see Windows:Vista.

Milestone 1 / 2 - unconfirmed builds

NOTE: Many sources claim that M1 and M2 were only planing phases of Longhorn, and the first confirmed compiled build was M3's 3663.

• Windows:Longhorn:3551.Lab01_N(storbuild).010917-1031
• Windows:Longhorn:3555.Lab01_N(storbuild).010925-0806
• Windows:Longhorn:3557.Lab06_DEV(lamadio).010927-0921
• Windows:Longhorn:3561.Lab01_N(storbuild).011003-1326
• Windows:Longhorn:3562.Lab03_N.011002-1958
• Windows:Longhorn:3589.Lab01_N(johnstra).011110-2230
• Windows:Longhorn:3590.Lab01_N.011118-2000
• Windows:Longhorn:3593.Lab01_N(daved).011129-1917
• Windows:Longhorn:3595.Lab01_N.011203-0927
• Windows:Longhorn:3599.Lab02_N(ntvbl02).020107-1351
• Windows:Longhorn:3609.Lab01_N.020211-2000
• Windows:Longhorn:3630.Lab03_dev(yasuho)
• Windows:Longhorn:3631.Lab03_dev(skatari).020509-1043
• Windows:Longhorn:3635.Lab01_N.020517-1743
• Windows:Longhorn:3637.Lab01_N.020522-2000
• Windows:Longhorn:3646.Lab01_N(portbld).020612-1346
• Windows:Longhorn:3661.Lab01_N(ianserv).020709-0927
• Windows:Longhorn:3663.Lab01_N.020724-2000

Milestone 3

• Windows:Longhorn:3663.Lab06_N.020728-1728
• Windows:Longhorn:3670.Lab06_N.020819-1749
• Windows:Longhorn:3680.Lab03_dev(skatari).020509-1043
• Windows:Longhorn:3683.Lab06_N.020923-1821
• Windows:Longhorn:3706.Lab06_N.021029-1731
• Windows:Longhorn:3708.Lab06_N.021108-1847
• Windows:Longhorn:3713.Lab06_N.021113-1841
• Windows:Longhorn:3718.lab06_N.021119-1730
• Windows:Longhorn:3728.dnsrv_dev(sergueik)
• Windows:Longhorn:3750.private_lab06_dev_ux(thomasj).021128-1402

Milestone 4

• Windows:Longhorn:4001.main.021204-1515
• Windows:Longhorn:4002.Lab04_N(yongqu).021218-1747
• Windows:Longhorn:4002.Lab06_N(ntvbl06).030108-1926
• Windows:Longhorn:4003.Lab01_N(forrestf).030116-1035
• Windows:Longhorn:4006.Lab01_N.030209-2000
• Windows:Longhorn:4006.main.030203-1038
• Windows:Longhorn:4007.main.030212-2037
• Windows:Longhorn:4007.main.030214-????
• Windows:Longhorn:4007.main.030219-1933
• Windows:Longhorn:4008.Lab01_N(briangu).030220-0837
• Windows:Longhorn:4008.main.030219-1933
• Windows:Longhorn:4011.main.030305-2045
• Windows:Longhorn:4014.Lab01_N.030325-2000 (note: might be just a typo)
• Windows:Longhorn:4014.Lab01_N.030326-2000

Milestone 5

• Windows:Longhorn:4015.main.030328-1500
• Windows:Longhorn:4015.lab06_n.030403-1706
• Windows:Longhorn:4018.Lab06_n030417-1721
• Windows:Longhorn:4019.lab01_N.030428-2000
• Windows:Longhorn:4021.main.030415-0745
• Windows:Longhorn:4023.Lab06_N(dandinu)
• Windows:Longhorn:4028.Lab01_N.030701-2000
• Windows:Longhorn:4029.main.030619-0000

Milestone 6

• Windows:Longhorn:4030.Lab06_n.030630-1724
• Windows:Longhorn:4032.Lab06_n.030710-1709
• Windows:Longhorn:4032.LAB01_N(skupec)
• Windows:Longhorn:4033.main.030717-1555
• Windows:Longhorn:4033.idx01.030730-1630
• Windows:Longhorn:4034.private/Lab06_dev(skatari)
• Windows:Longhorn:4034.private/setupvbl(matblock)
• Windows:Longhorn:4036.Lab01.030729-0100
• Windows:Longhorn:4038.Lab01_N(bryant).030803-2000
• Windows:Longhorn:4038.main.030813-1852
• Windows:Longhorn:4039.Lab06_n.030827-1717
• Windows:Longhorn:4039.Lab06_n.030828-1802
• Windows:Longhorn:4039.lab04_n(ahmeti)
• Windows:Longhorn:4039.private/Lab06_dev(skatari)
• Windows:Longhorn:4040.Lab04_N.030828-1910
• Windows:Longhorn:4041.Lab06_n.030829-1500
• Windows:Longhorn:4042.main.030905-1800

Milestone 7

• Windows:Longhorn:4042.Lab06_N.030909-1709
• Windows:Longhorn:4044.Lab06_n.030915-1925
• Windows:Longhorn:4048.lab02.030923-1849
• Windows:Longhorn:4050.idx02.030928-0552
• Windows:Longhorn:4050.private/lab06_demo.031013-1849
• Windows:Longhorn:4050.private/lab06_demo.031018-2015
• Windows:Longhorn:4050.private/lab06_demo.031019-1809
• Windows:Longhorn:4050.private/Lab06_dev(yasuho)
• Windows:Longhorn:4051.idx02.031001-1340
• Windows:Longhorn:4053.main.031022-1720
• Windows:Longhorn:4053.lab01_fusion(jaykrell).031029-2141
• Windows:Longhorn:4054.private/lab06_dev_ux(reinerf).031104-1800
• Windows:Longhorn:4057.private/lab06_dev_ux.031107-1900
• Windows:Longhorn:4058.lab06_n.03118-1808
• Windows:Longhorn:4059.main.031208-1842
• Windows:Longhorn:4060.private/Lab06_dev(skatari)
• Windows:Longhorn:4060.Lab04_dev(yongqu).040113-1005
• Windows:Longhorn:4061.Lab01_N.040125-2000
• Windows:Longhorn:4061.Lab01_N(skupec)
• Windows:Longhorn:4066.main.040226-1010
• Windows:Longhorn:4067.private/lddm_dev_tech(devdmo).040212-1646
• Windows:Longhorn:4067.Lab06_n.040307-1603
• Windows:Longhorn:4067.lab01_fusion.040316-2000
• Windows:Longhorn:4068.lab07_n(skatari)
• Windows:Longhorn:4069.Lab06
• Windows:Longhorn:4071.private/Snap_dev_ux(ntvbl06).040420-1521
• Windows:Longhorn:4071.private/Snap_dev_ux(ntvbl06).040426-1627
• Windows:Longhorn:4073.idx02.040420-1832
• Windows:Longhorn:4074.idx02.040425-1535
• Windows:Longhorn:4080.Lab06_n.040429-1614
• Windows:Longhorn:4080.Lab06_n.040502-1523
• Windows:Longhorn:4081.main.040503-1625
• Windows:Longhorn:4083.main.040516-1537
• Windows:Longhorn:4083.Lab06_n.040519-1614
• Windows:Longhorn:4084.main.040517-0915
• Windows:Longhorn:4085.private/Lab06_dev_tech(skatari).040430-0928
• Windows:Longhorn:4085.main.040603-1817
• Windows:Longhorn:4085.Lab07.040609-2350
• Windows:Longhorn:4086.main.040615-1745
• Windows:Longhorn:4086.lab03_dev.040629-1910
• Windows:Longhorn:4086.lab01_n.040704-2000
• Windows:Longhorn:4087.main.040626-0846
• Windows:Longhorn:4088.Lab07_N.040705-1625
• Windows:Longhorn:4088.Lab02_N.040706-1655
• Windows:Longhorn:4088.main(cjensen).040708-1751
• Windows:Longhorn:4089.private_lab06_dev_ux.040721-1800
• Windows:Longhorn:4093.Lab03_dev(a-micnaz).040714-1853
• Windows:Longhorn:4093.main.040819-1215
• Windows:Longhorn:4093.private/wcp_dev_platform(danmohr).041116-2208
• Windows:Longhorn:4094.private/Lab06_dev_platform(snaptab).041124-0021
• Windows:Longhorn:4094.private/Lab06_dev_tech(skatari)

External links

• Windows Vista Builds List - AeroXperience, includes pre-reset build tags
• Microsoft Collection Book, with tips on how to install leaked "Longhorn" builds
• Si vis pacem, para bellum, Grabberslasher's blog that describes several unleaked "Longhorn" builds