Cause: ADB server conflict or driver issue.
Solution:

adb kill-server
adb start-server

If persists, update drivers via Windows Device Manager → Find "Android" device → Update driver → Browse to Adb-setup-1.3 Full driver folder.

Adb-setup-1.3 Full.zip is a convenience package to get ADB/fastboot and drivers quickly on Windows, but it carries authenticity and security risks compared to obtaining platform-tools directly from official sources. Inspect, scan, and prefer official releases; follow the minimal-privilege and verification practices above.


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Cause: You did not accept the RSA key fingerprint on the Android device.
Solution:

To verify the installation was successful:

Note: You must enable USB Debugging in your phone's Developer Options before connecting.


Snoop05 created a lightweight, all-in-one installer:

The package would: