i've lost brain cells from reading this question and the comments but i'll give you some advice anyway.

there's more than 1 emulator, for every handheld/console to exist besides PS5 and the last 2 generations of Xbox.

you can type in google "best emulator for x console" (x being replaced by the console you want). its pretty rare for emulators to have viruses these days, and your question makes me think you don't know some emulators need a bios, and the roms. unless you have the games in physical discs.

emulation is huge but i have a feeling its not as big as it could be because it requires research and a decent PC depending on the emulator you want. all in all i'd say i wasted about 5 minutes of my life on this thread and it wasn't worth it. i'll rate this experience a C-