KingRoot is a rooting application designed to gain administrative privileges—commonly known as "root access"—on Android devices. The 4.4.2 version of Android was particularly compatible with KingRoot because of specific vulnerabilities in the Linux kernel used at that time.
While KingRoot is convenient, it is important to be aware of the modern consensus on this tool: kingroot apk android 442 portable
What is your for rooting (e.g., speed, deleting apps, custom ROMs)? Are you comfortable using a PC if the APK version fails? I can provide specific tips for your exact hardware! KingRoot is a rooting application designed to gain