If Networking is not working properly on your system running Windows 8 or later then this post will show you how to troubleshoot the problem. If you’re facing the issue of losing signal strength, the you need to first use the built-in Network Troubleshooter. You can find this troubleshooter in following manner:
1. Press
Windows Key + Q, type troubleshooting and pick the same from search results.
2. Next click
View all in the window so open which will take you to the
All Categories option.
3. Next, look for the
Network Adapter option here to open network troubleshooter and follow the on-screen instructions to perform troubleshooting, at last you may came around following result.

As you can see in the image above, the troubleshooting report says
The Diagnostics Policy Service is not running and the troubleshooter was unable to fix this, although it has detected it.
So in order to fix network issues due to this error, you can try following steps:
The Diagnostics Policy Service Is Not Running
1. Open the administrative Command Prompt.
2. Type following commands one by one and press Enter key after each command:
net localgroup Administrators /add networkservice
net localgroup Administrators /add localservice

3. After executing both the commands, you’ll got T
he command completed successfully message. Close the Command Prompt window and
reboot the machine, retry to connect the networks which are throwing trouble previously, this time you won’t face any issue.
twc