Thanks for your help! I deregistered the .dll and increased my internet security in IE to high.
As mentioned on another site, a malicious program may be able to re-register that DLL or even a normal application may re-register that DLL in regular activities. There is a lot of criticism of that "workaround".
BTW, changing IE's security higher will not stop this exploit. Turning off the viewing of images will stop it temporarily.