Such things are no longer fixed directly in the kernel or other OS code. They have shims that can be enabled on a per-application basis that sit between system

Such things are no longer fixed directly in the kernel or other OS code. They have shims that can be enabled on a per-application basis that sit between system calls and the program. Those can then fix such things, e.g. lie about the OS version, allocate a little more than requested to avoid buffer overruns, etc. Windows then ships with a database which application requires which shims; in Vista that included some 5500 programs.