Final answer:
To check for an embedded wireless card in a PC, the technician should use the Device Manager tool in Windows, which lists all hardware components, including network adapters.
Step-by-step explanation:
To determine if a PC has an embedded wireless card, the technician should use the Device Manager. This tool is part of the Windows operating system and provides information on all the hardware components installed in the system, including wireless network adapters. To access Device Manager, you can right-click on the Start button and select it from the context menu, or you can press the Windows key + X and select Device Manager from the list.
Once opened, Device Manager will show a list of all device categories. The technician should look under the category named 'Network adapters'. If an embedded wireless card is present, it would be listed here. Alternatively, if the technician finds a device with a yellow exclamation mark next to it under this category, it might indicate a driver or hardware issue with the wireless card.