Open Control Panel → Network and Internet → Network and Sharing Center.
Click your active Wi-Fi connection.
Select Wireless Properties → Security tab.
Check "Show characters" to reveal the password.
Open Settings → Network & Internet → Status.
Click Network and Sharing Center → follow Steps 2–4 above.
Launch Command Prompt as Administrator.
Enter:netsh wlan show profile name="Your_Wi-Fi_Name" key=clear
(Replace Your_Wi-Fi_Name
with your network's exact name)
Find the password under "Key Content" in Security settings.