These instructions are for disconnecting and removing Wi-Fi credentials.
Network & Internet settings
From the Windows desktop, navigate: Start > Settings icon > Network & Internet or press the Windows key and type in Wifi. Utilize the touchscreen (if available) or mouse to select on-screen options.
Tap or click Wi-Fi, then tap or click Manage known networks. If not available, refer to Microsoft's Manage wireless network profiles article and follow the instructions for "Show all wireless profiles on the PC" and "Delete a profile".
Tap or click the appropriate Wi-Fi network name. (in this example, SSD_Secured