This update has "successfully installed" every day for a
week. How can I convince update that it has been DONE
already?

Have the same Problem! The Installation history shows
installed twice. Now new problem is cannot install the
next critical update (17287)and four windows updates
a) 817778
b) 818043
c) 815485
d) 282010
All downloaded ok but hangs on install. Tried them one at
a time. Any help appreciated. Tnx.