: "Full version" installers from unofficial sources are common delivery methods for trojans and ransomware.
Searching for a "free download" of a commercial game like (originally a Neo Geo classic) often leads to sites bundled with malware or intrusive ads. If you want to play this retro shoot 'em up safely on your PC, here is the best way to do it. What is Zed Blade?
: SNK often re-releases their classics through the ACA NEOGEO series. You can find these on the Microsoft Store or GOG, which provide optimized versions that run natively on modern Windows without needing extra configuration.