Hi Kenneth Brown,
I understand how frustrating this is, especially when the same websites still work on another PC that has not received the update.
First, could you please confirm:
- Does the problem occur in all browsers (Edge, Chrome, Firefox), or only one?
- What happens when you try to sign in, do you receive an error message, return to the sign-in page, or does the page fail to load?
In the meantime, if the issue affects multiple websites after a Windows update, please try the following:
- Open"Settings" > "Network & Internet" > "Advanced network settings" > "Network reset".
- Select "Reset now" and restart the PC.
- After restarting, test one of the affected websites again.
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