Useful Registry Information on SharePoint Installation

In which architecture SharePoint is installed

Answer: check registry,

32bit:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Shared Tools\Web Server Extensions\12.0\WSS\InstalledProducts\90120000-110D-0000-0000-0000000FF1CE

64bit:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Shared Tools\Web Server Extensions\12.0\WSS\InstalledProducts\90120000-110D-0000-1000-0000000FF1CE

In which language SharePoint was installed?

Answer: check registry

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Shared Tools\Web Server Extensions\12.0\WSS\ServerLanguage\<LCID>

here you should see only one LCID

Which SharePoint language packs were installed?

Answer: check registry

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Shared Tools\Web Server Extensions\12.0\WSS\InstalledLanguages\<LCID>

here you will see something like this:

LCID - Reg_SZ - {language pack build level}

1033 - Reg_SZ - 12.0.4518.1000

1031 - Reg_SZ - 12.0.4518.1000

...

or

LCID - Reg_SZ - {language pack build level}

1033 - Reg_SZ - 12.0.6219.1000

1031 - Reg_SZ - 12.0.6219.1000

...

Note: It's important to have all language packs on the same build level!

Which server role is installed on each the server?

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Shared Tools\Web Server Extensions\12.0\WSS\ServerRole

Value = {Application || WebFrontEnd ||Standalone}

To get an overview about all Microsoft LCIDs you can use this article: Local ID (LCID) chart

Here are my favorites:

Locale description	Short string	Hexadecimal value	Decimal value
English - United States	en-us	0x0409	1033
French - France	fr-fr	0x040C	1036
German - Germany	de-de	0x0407	1031
Spanish - Spain (Traditional)	es-es	0x040A	1034
Italian - Italy	it-it	0x0410	1040

Which Custom Code was installed on the farm?

Answer:

a) Get All WSP-Files from FARM using SharePoint Farm Solution Extractor

b) Check if features were installed without wsp files!

using WssAnalyzeFeatures to get a list of all featureID's inside the farm. Then you need to compare the featureID's with the 12-Hive-Features-folder. Here you should find for each featureID the feature binaries.

c) In case you do not have the feature binary any more it's important to remove the feature completely from SharePoint using WssRemoveFeatureFromSite.