What are some alternatives?
When comparing Windows Defender and NetCut, you can also consider the following products
Malwarebytes Anti-Malware - Malwarebytes protects you against malware, ransomware, and other advanced online threats that have made antivirus obsolete and ineffective. Free Anti-Malware & Malware .
TuxCut - TuxCut is a netcut "in Windows OS" like software written in PyQt.
Avira Antivirus - Download Avira Free Antivirus 2018 and get award-winning PC protection, including next-gen security against ransomware and other threats. Download for free
CSArp-Netcut - An arpspoofing program that lets users launch spoofed arp requests to disrupt connections in a LAN
SUPERAntiSpyware - Superantispyware protects you against malware, ransomware, and spyware. Get started today with free trial and remove Spyware, Rootkits, Spyware, Adware, Worms, Parasite!
WifiKill - App with ability to block other devices from network