i think it's just a total noob, who got lured into the "rapidgator download manager" malware which is selected by default on every free download. as most noobs who don't read anything, he probably missed the text and just went 'OMG DOWNLOADOWNLOADOWNLOADOWNLOADOWNLOADOWNLOADOWNLOADOWNLOADOWNLOAD wait, virus?'
any time you see the word "downloader" or "download manager" you should automatically translate it into virus or malware.
any time you see the word "downloader" or "download manager" you should automatically translate it into virus or malware.