If you have read my previous posts on Wifikill and Netcut, you already aware about the these software and their working. Wifikill is a networking app for android which can be used to disable internet access of users which are connected to same network as yours. This means anyone who has wifikill app can kick your device off the Wi-Fi network and you will not be able to access the Internet. The purpose of Netcut(Wifikill for PC) software is same, the only difference is netcut is for windows PC while wifikill is for android. You can face this problem mainly when you are using public Wi-Fi network.