Further details and a screenshot of my CPU consumption were posted today in my thread in the MS Answers forum.As of June 2016 there are currently five Win32updates listed on Dalai's webpage [KB3078601 (18-Aug-2015); KB3087039 (08-Sep-2015); KB3109094 (07-Dec-2015); KB3145739 (12-Apr-2016); KB3161664 (14-Jun-2016)] that must be pre-installed before you run Windows Update if any are missing from your system.I don't have a Win 7 computer at home so I'm not the best person to ask about slipstreaming the OS image (which isn't the topic of this thread), but the Microsoft Tech Net article And since this update can be injected into Windows 7 SP1 media, it’s fully supported to mount a Windows 7 SP1 image (WIM file), then inject this update into it.See https://technet.microsoft.com/en-us/library/dd744559(v=ws.10)for the details of how to do this...about a new rollup for Win 7 SP1 that includes all updates as of April 2016, as well as an upcoming change that will see all non-security updates for Win 7 SP1 and Win 8.1 combined into a single monthly update.Kudos to Vista1972, who posted that link in the Vista Forums thread has a workaround that apparently works for many Vista users as well.
The term 'solution' might be a little bit exaggerated, since the following How To only tries to make sure that the Update Agent doesn't need to check all updates, so the check for new updates is done faster.
Just FYI, I posted comments today in post # 162 of the Vista Forums thread about a similar problem that Win XP users experienced three years ago after Win 8.1 was released.
In that case, Microsoft fixed the problem by expiring some of the outdated updates in the supersedence chain for programs like the IE browser so that the Windows Update Agent could quickly determine which patches need to be applied and which older updates had been superseded and could be ignored.
Three passes on Windows Update to bring things current - the first took 35 min or so to find updates, the other's were quite rapid...
" hang on my Vista machine since Aug 2015 so the upcoming change to combine non-security updates for Win 7 SP1 into a single monthly update might be a significant development for Win 7 SP1 users who also suffer from these slow Patch Tuesday updates.