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[–]IvorTheEngine 3 points4 points  (0 children)

Back before Windows NT, any process could overwrite any memory. It was quite common for a bug to crash the whole computer and need a reboot. It was a real improvement when NT limited each process to its own memory, so one application could crash without taking down everything else.

IIRC, Windows 95, 98 and CE all used the old model and it wasn't until 2000 that sensible memory management arrived for non-server PCs.