You might need to change the Boot order to be able to boot to a USB stick.
On older machines, there might be an interrupt problem with a new sound/video card that needs to be resolved.
You might need to reset all settings to the default settings due to unexpected results.
Some BIOS allow you to overclock your CPU and the might need to be changed back due to system instability.
Answer:
The command to use to check if he can connect to the server is the ping command.
Explanation:
The ping command is a network testing command to verify that one computer can reach or communicate with another computer on the network.
In Microsoft, the ping command is used in the command prompt window.
The ping command sends an Internet Control Message Protocol or ICMP Echo request or packets to another computer on the network and waits for a reply. The reply either informs you of the time it took to communicate with the other computer or inform you that there was no response.