Windows 10
Windows 8.1 / 8 / 7
Important things to remember
Windows 10
Step 1:
Press the Windows
key + D on your keyboard to show the Desktop.
Step 2:
Right-click on the connectivity icon on the system tray of your desktop.
Press the Windows

Step 2:
Right-click on the connectivity icon on the system tray of your desktop.

Step 3:
Select Troubleshoot problems.

Windows will now perform troubleshooting steps to fix your connection. Wait for the confirmation stating that the repair has been successful.

Windows 8.1 / 8 / 7
Step 1:
Press the Windows
key + D on your keyboard to show the Desktop.
Step 2:
Right-click on the connectivity icon on the system tray of your desktop.
Press the Windows

Step 2:
Right-click on the connectivity icon on the system tray of your desktop.

Step 3:
Select Troubleshoot problems.

NOTE: Windows will now perform troubleshooting steps to fix your connection. Wait for the confirmation stating that the repair has been successful.

Important things to remember
Windows Network Diagnostics is unable to repair network connection
Depending on the type of operating system that you are using, you may encounter an error message regarding the Network Diagnostics tool.
Windows 10 / 8.1 / 8 / 7

If you receive this message, it means that the tool was unable to fix the problems that were detected. Should this occur, you can refer to the following to fix your connection:
How to resolve inconsistent, slow, or weak Wi-Fi connection
Troubleshooting “Unable to connect to a wireless network” issue
9 Tips on how to fix a lost Internet Connection (Video)