The danger of modifying the physical address of the computer network card is that sometimes the network connection protocol cannot recognize the computer and cannot connect to the network. The solution is: first click [My Computer - Properties] in sequence; then select [Hardware] Click on the properties of [Device Manager]; finally select [Does Not Exist] in Advanced.
The MAC address is the physical address of the network card. It is solidified in the chip of the network card and should be unique under normal circumstances.
It is best not to change the MAC address randomly, otherwise sometimes the network connection protocol will not recognize the computer and cause the computer to be unable to connect to the network.
You can pass the following Method to change to the original MAC address:
1. Right-click "My Computer" and select the "Properties" option.
2. Select the "Hardware" tab and click "Device Manager"
3. Right-click on the "Device Manager" interface to use the Internet Network card, select the "Properties" option
4. In the network card properties interface, select the "Advanced" tab, and under the "Properties" column, find the "locally administrator address" or "network address" option, on the right Select "Does not exist" on the side.
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