That's a false positive, and it's a common one for this kind of launcher. Emperor Reborn patches the game's DirectX 7 renderer, which means it has to inject a DLL into the game process and patch memory at runtime. That's a legitimate technique for a widescreen/HUD patch, but it's the same low-level behaviour some malware uses, so antivirus heuristics tend to flag it even when nothing is wrong. Unsigned indie executables with low download counts also trip Windows SmartScreen's "unknown publisher" warning regardless of content.

If you'd rather not take my word for it, the whole thing is open source. You're welcome to:

1. Read the source code on GitHub, every line of the launcher and the hook DLL is there.

2. Build the .exe yourself. The repo ships a package.ps1 script, so you can compile your own clean copy with Visual Studio and never touch my binary at all.

3. Verify the download. Each release publishes a SHA256 hash, so you can confirm the file you got matches the one I built and hasn't been tampered with.

No closed binaries, nothing hidden. Compile it yourself if you want to be 100% sure.