Unknown registry entries in HKLM

[Guest]

Anyone have any idea what these keys may be for

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OptionalComponents

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OptionalComponents\IMAIL
"Installed"="1

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OptionalComponents\MAPI
"Installed"="1
"NoChange"="1

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OptionalComponents\MSFS
"Installed"="1"

 

[krok dundee]

Anyone have any idea what these keys may be for?

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OptionalComponents]

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OptionalComponents\IMAIL]
"Installed"="1"

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OptionalComponents\MAPI]
"Installed"="1"
"NoChange"="1"

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OptionalComponents\MSFS]
"Installed"="1"

Hi XP, not sure but mine are the same. mail and fax services i tink..

 

[Guest]

I've removed them and have not noticed any problems with Outlook and its workings with our Ancient Exchange 5.5 server but I would like to know what (app) and when they were entered and of course why. Thanks for your voice dundee