Which Web Shield are you referring to . . . . the virus Web Shield, the AVG web shield . . . something else ? The virus version you can remove with Malwarebytes.

The virus, and I'll try Malwarebytes. Thanks much.

If you google for it, there are several removal instruction sites out there. Some sites say you can just use Add/Remove.

Another shows how using Add/Remove, then removing the Web Shield browser extensions, then using Malwarebytes. Here's that page :
http://botcrawl.com/webshield-virus-removal/
I wouldn't use any of the links on that page or call the phone number on that page, just to be safe. The rest looks ok.

One page says that Web Shield prevents you from launching any other program. It says to activate it first, then use Malwarebytes to remove it.
I'd try all methods besides activating it first, but here's that page :
http://malwaretips.com/blogs/windows-web-shield-removal/

If you still have trouble report back and we'll see if we can help out.

-Kent

Malwarebytes did it!
Many thanks...