AppInit_DLLs host key

What lives here

The AppInit_DLLs value here forces a DLL to load into nearly every program that draws a window.

What changing it does

A DLL listed here injects into almost everything you run — one of the oldest persistence and spying techniques. Modern Windows restricts it, but any .reg file touching it deserves hard scrutiny.

Risk level: danger. A .reg file from an unknown source touching this location deserves real scrutiny before you merge it.

Deciding whether to trust a file at all? Read the guide: Is this file safe to open?