Windows USB Blocker will quickly block or unblock USB storage devices on any Windows system.USB devices are one of the primary causes for spreading virus/malware from one system to another without the user knowledge. Often it is risky to allow others to insert USB stick (often infected with virus) into your system. Hence it is always advised to disable USB when you are not around.In such cases, Windows USB Blocker tool will help you to instantly block USB and safeguard your system from these viruses.Beauty of this tool is that it will block only USB Storage devices like USB Sticks or Portable Disks. However normal USB devices like wireless keyboard/mouse plugs, bluetooth/wireless/internet dongles will continue to work without any problem.It has cool GUI interface and very simple to use for everyone. With just one click you can instantly Block or Unblock USB on your system and it is fully portable.