New Keyboard Works in Windows Apps, But Not in Browsers – What’s Wrong?

This doesn’t sound like a keyboard issue, since it's working fine in Windows apps but failing in browsers. Something is likely interfering with your input. Start by checking the accessibility settings and make sure 'Filter Keys' is turned off. You should also close any RGB or macro software like Razer Synapse or Logitech G Hub, as well as any overlays such as Discord and GeForce Experience. If it works fine in Safe Mode, it's definitely a background program causing this problem.

Honestly, if none of this resolves the issue, a clean install of Windows might be the best way forward. Be sure to back up everything important though; it’s a hassle but it could save you from ongoing headaches.

It might be a good idea to reset the Text Services Framework (TSF), which manages keyboard input for third-party apps. You can do this by deleting a specific registry value. If you're feeling adventurous, you could also try disabling any speech recognition or handwriting features in the accessibility settings, as those can also mess with input.

Here’s a thought: try creating a new Windows user account to see if the keyboard works there. If it does, it points to a per-user setting or software conflict. Also, check your language settings to make sure there’s only one input language installed and no IME activated—those can buffer your keystrokes and cause input issues, particularly in browsers. If you haven't already, run your browsers as an administrator; this can sometimes bypass interference from background apps.