A network security code is the Wi‑Fi password (security key) configured on the wireless router, not on the computer. Resetting the computer does not change this code.
To connect again after a reset, either look up the existing security key on the router or set a new one on the router, then enter it on the Windows 10 PC.
1. Find or set the security key on the router
Check the router label first:
- Many home routers have the default Wi‑Fi network name (SSID) and security key printed on a sticker.
If that does not work or was changed, configure it in the router settings:
- Open a web browser on a device already connected to the router.
- Go to the router’s management address (often printed on the router label).
- Sign in with the router’s admin username and password.
- Find the Wireless or Wi‑Fi settings page.
- View or set the security key / passphrase and note it.
For better security, change the default router admin username/password and use WPA3 if supported:
- “Change the default username and password” on the router.
- “Set up a security key (password) for your network” and use WPA3 if the router and PC support it.
2. Enter the security key on Windows 10
Once the key is known:
- Select the Network icon in the taskbar.
- Select the Wi‑Fi network name (SSID).
- Click Connect.
- Enter the network security key (Wi‑Fi password) and confirm.
3. (Optional) Use WPS if the router supports it
If the router supports Wi‑Fi Protected Setup (WPS):
- On Windows 10, select Start > Settings > Network & Internet > Status > Network and Sharing Center.
- Select Set up a new connection or network.
- Select Set up a new network, then Next.
- When prompted, press the WPS button on the router. The PC will connect without manually typing the key.
For small business or older Windows setups, a security key is still required; it is always defined on the router and then entered on each device that connects.
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