Sounds just like the Windows 7 update farce that went on for months and months last year that was eventually fixed by everyone but Microsoft.
Woody on windows issues - reads like a war story
https://www.computerworld.com/blog/woody-on-windows/
Microsoft security update stories
www.askwoody.com
If your really desperate and windows updates isnt working
Microsoft®Update Catalog
best used in conjunction with articles that say which KBs to download for your version
on windows 7/8/10 etc
https://www.catalog.update.microsoft.com/Faq.aspx