Unfortunately, System Restore is not enabled by default in Windows 10 or 11, since Microsoft does not want you to recover from issues such as this. You should enable it once you have everything fixed, but unless you previously enabled it, you will not be able to use it now since there are no restore points.

https://www.thewindowsclub.com/syste...estore-windows

https://www.windowscentral.com/how-u...ore-windows-10

I assume that you only have Edge as a web browser. If you have something else installed also, try using that for web access. The Snipping Tool should be available to capture the screen so we can see what is happening.

If you right-click on the Start button, and select Command Prompt, then enter winver and press Enter, it should show you what version of Windows you have. Post that information here.

You can try adjusting the screen resolution and/or the scaling so you can read things.

You can also download the Firefox installer on your other computer and then transfer it using a flash drive to the problem computer, then install it. Then you can quit using Edge.

Once you get everything fixed again, it may be time to start a using an image backup program monthly before Patch Tuesday. You can also prevent the Windows 11 "upgrade" using the following information:

https://www.howtogeek.com/765377/how...on-windows-10/

Do you have an installation DVD or flash drive for Windows 10?