Security Update for Microsoft .NET Framework 4 (KB2416472) Stuck at 66% downloading using SCCM
Well this one has plagued us for a couple of weeks. Took a while to track down. Turns out that when you initially deploy this, it only downloads 2/3 packages (hence why it gets stuck at 66%). You can confirm this by finding the update (either in the update list, search folder, deployment, where ever…I suggest update list), then going to the content information tab. One of the packages will say no. To fix it, find the update in your update list or search folder and right click and download it again. Once it has finished downloading, you will need to update your distribution point for you deployment package. After that, you should be in business again.