
Visual Studio Context Sensitive Help (F1) not linking to MSDN
Context Sensitive Help (F1) was not working for me in Visual Studio.
Here's the info for how I fixed it:
F1 link between Visual Studio and MSDN: Both must be installed while
logged on as the same user that will use them, NOT the administrator.
If either is installed using a different userid, the F1 linkage does
not work. This is probably due to a registry setting during the
installs.