Kali Linux Network Keeps Going Down

Hi all. I am using Kali Linux and every time I start it after a few minutes I lose connection. If I navigate to the network box at the top it says “Networking disabled”. I did everything Zaid said to do in “Learn Ethical Hacking from Scratch” and have it connected by NAT network in the VirtualBox settings.

If I power off then restart Kali it will be connected but after a few minutes it shuts off. But the funny thing is that on my main computer everything is fine (I am connected to the network).

Can somebody tell me how to fix this? Thanks

I figured out that it goes off after I use the command:

airmon-ng check kill

I do this as a part of putting my wireless adapter in monitor mode. How do I turn the network back on after this?