Open the device manager window of your computer and find the item "Network Adapter" here. After double-clicking the menu item of the network card, you can open the menu and find the network card driver. Uncheck the check box before "Allow the computer to turn off the device to save power", and finally click OK, so that the problem of network disconnection will not occur after restarting. Detailed steps:

1. On the desktop of Windows 10 system, we right-click the "This pc" icon and select the "Properties" menu item in the pop-up menu.

2. At this point, you can open the computer system properties window and click the "Device Manager" menu item in the left sidebar.

3. At this time, you can open the device manager window of your computer and find the item "Network Adapter" here.

4. After double-clicking the menu item of the network card, you can open the menu and find our network card driver.

5. Right-click the network card driver, and then select the "Properties" menu item from the pop-up menu.

6. At this point, the network card properties window will open, and click the "Power Management" tab above.

7. In the new window that opens, we uncheck the box before "Allow the computer to turn off the device to save power", and finally click the "OK" button. After the restart, there will be no more network disconnection problems.