3 Threads
INDIVIDUAL PROCESSES on Windows are sequential by default. Even on a multiprocessor machine, a program (by default) will only use one of them at a time. Running multiple processes at once creates concurrency at a very coarse level. Microsoft Word could be repaginating a document on one processor, while Internet Explorer downloads and renders a Web page on another, all while Windows Indexer is rebuilding search indexes on a third processor. This happens because each application is run inside its own distinct process with (one hopes) little interference between the two (again, one hopes), yielding better responsiveness and overall performance by virtue of running completely concurrently with one another.
The programs running inside ...
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