WEBCHECK.DLL
"Enables a client program to control the subscription manager for Internet Explorer."
By subscription manager they mean the "channels" which Internet Explorer sets up on your desktop and in your favorites when IE is first installed. WEBCHECK.DLL manages these.
Renaming tha file may help your cause.

You know, one has to admitt, with all the hardware and
software variations everyone has, it always amazes me
that M$ programs work as well as they do.
I may have the same setup as you and run smooth
while another crash and burn.
Good luck.