[windows]uninstall TCP/IP stack

Yestoday, my classmate's laptop is inspection. after cleaned the
virus. TCP/IP stack is broken

when i run ipconfig , it output nothing.

I decide to uninstall TCP/IP, then Google & Baidu.

the method is

change 0xa0 to 0x80 in the file "%windir%\inf\nettcpip.inf"