Google is your friend:
MAPI:
http://en.wikipedia.org/wiki/MAPI
IMAIL Intelligent Mail (trademark of the United States Postal Service)
MSFS Microsoft Fax and Windows Messaging (as in the file "msfs.cnt")
You probably installed the Fax optional Windows component.
"cateyedude" <(E-Mail Removed)> wrote in message
news:81D273D1-8328-4E1C-8DC3-(E-Mail Removed)...
>I just rebuilt this PC and loaded 'Windows XP Pro upgrade' using my old
> Windows 98 disk as the qualifying product for upgrade.
>
> After I finished all updates (close to 100 now), loaded Windows Live
> OneCare
> on as my antivirus, and installed a HP Photosmart 8150 printer, I noticed
> a
> new key in the registry. The path is as follows:
>
> [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OptionalComponents\]
>
> It contains 3 subkeys: IMAIL, MAPI and MSFS. All have values of
> "Installed=1" and MAPI has the additional value "NoChange=1"
>
> Since this Key appeared only after updating to the Microsoft website, or
> installing a Microsoft product, I cannot help but feel the key was created
> by
> one of these events. I do not believe the HP printer is responsible as I
> have
> had it installed previously, and this key was not there.
>
> Why is this key created? What is this key used for?
>
> Any informed insight will be appreciated; Please do not respond if you are
> merely guessing.