In Windows 11/10, you require a strong network connection if you’re signing in for the first time using Microsoft Account. You also need a non-intermittent web connection when you’re using Windows Store. Many times users have a fluctuating Internet connection and they start complaining that the Windows Store doesn’t work at all. Users may also come around the following error while signing in using Microsoft Account on their system:
We Couldn’t Sign You In error in Windows

We too faced this issue still after having a HSPA connection with a speed of around 21 MBPS. This was enough good speed to go, but unfortunately, the system doesn’t allow us to sign in. Hence it clearly seems like the network is not the culprit in our case, and we need to try the following fix to solve this issue:
1. Press Windows Key + R combination and put inetcpl.cpl and hit Enter to open Internet Properties.
2. Next, in the Internet Properties windows, click on the Connections tab and click LAN Settings button then:

3. Moving on, in the LAN Settings box shown below, uncheck the Use a proxy server for your LAN option. Click OK.

You could also try the Windows Apps Troubleshooter. It would automatically find out and fix issues if any.
Finally, open administrative Command Prompt and type wsreset.exe and hit Enter. It will clear the Windows Store cache on your system. Check out now if you can sign in, you should now be able to do so easily.
We hope that this tip is able to help you.
