This is the dangerous part. The internet is filled with pop-up ads, fake "EXE download" buttons, and malware. You should run an executable file claiming to be a ROM. ROMs are not .exe files; they are .nes , .smc , .bin , .iso , or .zip .
Once you have downloaded your emulator and your ROM, here is how to get playing in under five minutes. download retro games for pc
A significant portion of gamers looking to download retro games for PC head to "Abandonware" sites. Abandonware refers to software that is no longer sold or supported by the copyright owner. This is the dangerous part