Do not download drivers from third-party "driver update" sites. They often bundle malware.
For Download Mode (used by Odin):
adb devices
Do not use generic driver updaters. Use the direct link from Samsung’s official support page (search “Samsung USB Driver v1.7.86”). Alternatively, use this exclusive mirror (verify MD5 hash: a1b2c3d4... ). samsung exynos 3830 drivers download exclusive