JS/DwnLdr-MON is considered as a Trojan horse which is able to infiltrate into your computer system with the help of free downloads that are shared on the Internet. Sometimes, it can distributed via scammed sites or other illicit method. As soon as it gets into your PC, it will make modifications of your operating system. Most of your system settings will be corrupted especially your registry entries. Then i twill drop malicious codes or malware to your PC without your approval. What's more, your computer will be flooded with a lot of computer threats which will highly degrade your computer system. Sometimes, your PC will be turned to blue screen of death.