After W10 update all my network passwords are missing and doesn't work anymore when I enter it?

[WPCentral Question]

After W10 update all my network passwords are missing and doesn't work anymore when i enter it.

I have 2 pc's connected via a router, i did a W10 update this morning and since then i cannot access the data on one pc from the other, the passwords i used does not work anymore and it says one or more network protocols is missing, does anyone have an idea how to fix this please?