While you cannot download a native PC version, you can play the game on your computer using or remote play . Here are the two legitimate (and technically legal) methods, provided you own a copy of the game.
A: No. The game is not on Steam. You will never find a Steam key for this title. Diabolik Lovers Dark Fate Download Pc
A: Because it is a virus. Legitimate visual novels do not require you to disable your antivirus. Delete the file immediately. While you cannot download a native PC version,
If you own a PlayStation TV (which plays Vita games on a TV), you can connect it to a monitor via HDMI. For true "PC" control, use a capture card to display the gameplay in a window on your computer screen. This is not a download, but it satisfies the goal of playing on a PC monitor. The game is not on Steam