fcmartins wrote: > Multithreading only appeared, for practical purposes, 15-20 years ago If you want to talk about ancient times, do it somewhere else. Wine isn't that old. Also look at the topic, it says "pthreads" as in POSIX-threads. Those are real kernel level threads on all systems now days. Yes some long time ago all threads were separate processes. This is what Wine had support for "kthreads" for. But now this support is removed. And only real threads are supported.