Windows 10 PEAP problems – Cannot connect to Wifi

Updating to Windows 10 and find you can’t connect to your corporate / enterprise Wifi?

Windows 10 updated the end of 2015 and changed how it connects to PEAP Wifi connections – these are the Wifi connections most used in large companies, where you have a username and password to login. It now uses TLS 1.2 to connect which is more secure, great. But the problem is there is a bug with the server which you connect to, it doesn’t correctly support TLS 1.2.

This can be easily fixed by whomever supplies the wifi, they just need to update their server with the fixed version. But, as you may know, if you work in a corporate environment, the more probable outcome is that they will simply say ‘We do not support Windows 10 on the wifi network’.

Luckily, you can solve this issue locally, with a simple registry change.

Create DWORD HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RasMan\PPP\EAP\13\TlsVersion

Set theĀ DWORD value to C0.

Now simply restart the Wifi service – Press start, search for services, open. Now in the list look for ‘Extensible Authentication Protocol’ and restart that.

Connect back to your wifi, and all should be working fine.