How do you change the build number in XP?

[Memphis]

As a stupid experiment, i will try to install service pack 3 on build 2542, however this service pack requires a build number of 2600 (the rtm build number) is there a way to change the build number and trick the installer? i think its possible because of this build being a few days before the rtm release.

[Fanta Shokata]

Start -> Run -> regedit -> OK
This will open Registry Editor
Now you must go to HKEY_LOCAL_MACHINE -> SOFTWARE ->Microsoft -> Windows NT -> CurrentVersion
Then you should find the following values:

Code: Select all

CurrentBuild
CSDVersion
BuildLab
Version

Double click on them and change the value.

[dixieLH]

unless it checks in kernel, then you have to hex edit it
(and it usually does)

[Memphis]

Start -> Run -> regedit -> OK
This will open Registry Editor
Now you must go to HKEY_LOCAL_MACHINE -> SOFTWARE ->Microsoft -> Windows NT -> CurrentVersion
Then you should find the following values:

Code: Select all

CurrentBuild
CSDVersion
BuildLab
Version

Double click on them and change the value.

I remember doing the registry method but it reset on restart

[AlphaBeta]

As a stupid experiment, i will try to install service pack 3 on build 2542, however this service pack requires a build number of 2600 (the rtm build number) is there a way to change the build number and trick the installer? i think its possible because of this build being a few days before the rtm release.

Not quite sure what you expect to happen. At best, it will just be 2600 SP3 with a bunch of 2542 leftover files.

[dixieLH]

I remember doing the registry method but it reset on restart

the reg method works
but you have to do it on logon
use BAT/CMD script