I am new to WSUS 3.0. I installed a clean install. I synched and I have 99%
of my updates already installed so I don't want to download them.

With WSUS 2.0 you can Automatically approve for download all NEW critical
updates. I found that option with WSUS 3.0

However, I inadvertently clicked "run rule" and now I can't stop it!!!

It is downloading the hundreds of updates that I don't need and have already
installed. Cancel doesn't stop it. I have stopped the services and restarted
and I am hoping that it will do the trick.

They really should have a "Stop" for this as it is insane.