Why is "Help and Support" not available from Start menu?

About three weeks ago I bought a new PC from Dell with with XP Professional.
I found out quickly that if I press Start-Help and Support, nothing
happens.

After much tinkering, I discovered that the Help and Support screen is
invoked by running the program
C:\WINDOWS\PCHealth\HelpCtr\Binaries\HelpCtr.exe. So I have created a link
to this program in my start menu, which works around the problem.

There remains the curiosity that the link between this program and the Help
and Support tag that appears on the start menu is broken. Does anybody have
any idea about why this has happened, and how to fix it?