Network card cannot be found and Solutions

Situations:
1. You have blocked the NIC that comes with the motherboard in the BIOS. In this case, you can recover the bios settings of the motherboard.
2. Your Nic project is not absent, but you have no driver. Therefore, the yellow exclamation point of the pci device is displayed in the DEVICE Manager, in this case, use the NIC driver that comes with the motherboard for the driver.
3. This is also the case, but it does not often happen, that is, the NIC on your motherboard is burned, so you cannot recognize it.

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The above is the situation where the motherboard comes with a nic.
The following figure shows
4. The NIC is not plugged in.
5. No driver for the NIC
6. Nic chip damage