What is the "three items" (No viruses, No Trojans, no plug-ins) mark?

Jiang Min's anti-virus experts reminded a large number of computer users that various "Trojans" and "rogue software" have become the main factors endangering the Internet. Users must be careful when surfing the Internet, do not randomly download any software from a small website. When downloading software online, you must identify the "three items" (No viruses, No Trojans, no plug-ins) sign to avoid Trojans and rogue software infringement. If unfortunately, you can use anti-virus software with the "rogue software cleanup" function (such as Jiangmin kv2007) processing ..................

It is unclear what the "three items" (No viruses, No Trojans, no plug-ins) mark is? Who knows? Hope to tell you.