Unlike the later , Jet 4.0 was never packaged as a standalone installer you could legally distribute. Any website offering Jet40SP8_9xNT.exe or similar is likely an old archive—not a supported Microsoft download.
If you are working on a legacy machine (Windows XP, Vista, or Windows 7), the Jet 4.0 engine is likely already installed as part of the operating system. download microsoft jet oledb 4.0
: Starting with Windows 2000, the Jet 4.0 engine became a core component of the Windows operating system. Unlike the later , Jet 4
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