Welcome to the forum, Paul. A couple of things to start off: you'll see in the banner at the top of this thread there's a link to tsginfo.exe. Please download and run this on your laptop and then post the results back to this thread so we have an idea of what we're dealing with regarding your system.
Let it scan your system and see if it finds any errors. If it does, hopefully it can repair them properly for you. If so, try rebooting, logging back in, and then trying to use one of your browsers.
- Before the browsers stopped working, did you install any software / updates / browser add-ins?
- Which specific error message do you get in the browsers?