Eu encontrei este comentário:
To actually answer your question...Search for "key mapper" on google. Among others it will lead you to sharewareconnection.com which lists many (some reviewed) mappers. One that is listed there that may be what you need is http://www.easysofts.com.cn/en/, but I can't be positive from the description, however you can ask them. At least this will point you in the right direction. Take the usual precautions when downloading and installing shareware.
I believe that this will allow you to disable CTRL-W on a Windows level (not just IE), but perhaps that is what you meant by "I don't ever want to use it."
em este post .
Ainda não investiguei totalmente o link, mas parece que (ou algo assim) é o que você quer.