Issue With Opening Browsers After Windows Update

Update was done on Monday. Since then, we are unable to go to certain websites, we get an ERROR 505 or just a blank, white page while it shows the page is loading, it just never does load. 
I tried to uninstall the update to go back to normal, but Windows now says there are no updates to uninstall. I have gotten an IT guy involved and he tried to solve it as well but he says it must be a bug in the Windows update as everything was fine until the update happened. 

I have tried the following...note that I also restarted the computer after each attempt to fix this issue:

• Uninstall the updates (cannot uninstall them though)
• ran my antivirus
• ran the computer in safe mode
• cleaned out the cache, browsing history, downloads and cookies
• uninstalled firefox and google chrome then reinstalled them
• troubleshoot Windows
• troubleshoot Microsfot Exchange
• modify/fix Microsoft Exchange
• tested internet connection
• tested that the websites were not down or having issues (they were not)
• tested the websites on different computers (they are all on Windows 11 - no issues)
  
  Nothing has worked. 
  Still error 505 or just a blank page.
  
  the system is a Windows 11
  The other two computers are fine (we did not update them). 
  HELP!