Just in case this was posted before... I'll post it again. 

Hopefully this will help those who are running into outdated Help files after upgrading to SP1.

From the KB article:

INTRODUCTION

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MORE INFORMATION

loadTOCNode(1, 'moreinformation');Windows Vista SP1 stand-alone packages do not contain the updated Vista SP1 Help files.

The updated Windows Vista Help file packages are named "Update for Help Files." These files are packaged separately for each language.

The updated Help files have been excluded from the stand-alone packages to reduce the size of the packages. However, the updated Windows Vista Help files are contained in the integrated SKUs of Windows Vista SP1. Therefore, a clean installation of Windows Vista SP1 does not require an updated Help file for the base language.

The following list describes various scenarios in which you must manually install the "Update for Help Files" package to obtain the updated Windows Vista Help files:

•	You install Windows Vista SP1 on a computer that is running the release version of Windows Vista by using Windows Update or by using a Microsoft Update Standalone (MSU) package for Windows Vista.
•	You have a Windows Vista Enterprise SKU installed or a Windows Vista Ultimate SKU installed, and then you install a new language by using the language packages. In this scenario, you must manually install the updated Help file because the "Update for Help Files" package uses the language that corresponds to the content language. Packages of "Update for Help Files" are language specific. For example, you cannot install the German version of the "Update for Help Files" package on a Windows Vista-based computer unless that computer already has the German language installed.
•	You remove a language package from a Vista-based computer after you install the "Update for Help Files" package for that language pack that you removed. In this scenario, the "Update for Help Files" packages are automatically removed.

The MSU package for "Update for Help Files" will be released through the Microsoft Download Center. Additionally, the same updates will be released through Windows Update for all languages. However, the "Update for Help Files" packages are built under the same Microsoft Knowledge Base article number, KB 937286. Therefore, if a system has more than one language installed and also has the corresponding "Update for Help Files" packages installed, Windows Vista Software Explorer displays multiple entries of KB 937286. Additionally, the title of the package will not display the language of the package.

 

To boil it down..... just go to (local disk drive) Windows\Help\Windows\en-US.   (or other in case of a different language)  If the majority of files are dated from 2006, they are old.  If the majority are dated 2008, they are updated.  What's kinda strange, is that MS said they did this to avoid a huge SP1 download of the stand alone package,.... these file sizes here are less than 25MB.

32 Bit Help Files Here

64 Bit Help Files Here