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Unfortunately, that video was created in 2017 and doesn't take into account that users will now have to install additional "speed up" patches if they have MS Office 2010, MS Office 2007 and/or the MS Office Compatibility Pack SP3 add-on installed, since these MS Office products were (or still are) supported beyond the end of extended support for Vista SP2 (1) and will also cause these " Checking for updates." hangs. It looks like the five Vista SP2 / IE9 "speed up" patches used in that video ( KB32053638, KB4012538, KB4015195, KB4015380 plus KB4014661 if IE9 is installed) are identical to what I suggested back in April 2017 in my step-by-step instructions on page 1 of m#l's thread Updates not working, it has been searching for updates for hours where I post as user Great White North. Thanks for the link to that July 2017 video.
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