The problem was that Windows 11 was a fortress compared to the open fields of the XP era. Its "Core Isolation" and "Memory Integrity" features treated unsigned drivers like multikey.sys as intruders. To the OS, this legacy emulator was a ghost—a security risk from a time before digital signatures were law.
multikey.sys on Windows 11 is not malicious by default – it’s an old, legitimate driver for multiple keyboard emulation. But because Windows 11 enforces tighter driver security, this file is a common source of BSODs and boot issues. multikey.sys windows 11
, you can generate a system report using these standard Windows 11 tools: System Information (NFO) Report The problem was that Windows 11 was a