If Code 28 appears, please note first that though the message may say The drivers for this device are not installed, the drivers do not come from Seagate, they must come from Windows. This is an indication that troubleshooting is necessary.
- Please test the drive using a different USB cable if you have one.
- Please test the drive on another computer. If the drive works fine on another computer, the original computer may need to be upgraded to the latest Windows Service Pack.
- Within the Device Manager, find the drive.
- Right-click on it and choose Uninstall.
- Wait a few seconds for the icon to disappear, then disconnect the device from the computer (unplug the USB cable).
- Reboot your computer and wait until Windows is fully started.
- Reconnect your drive and see if the error is still there.
- If it is, please follow the troubleshooting steps in Document ID: 201235.
If it is detected on the other computer, it appears the Windows installation on your first computer has been corrupted.
You will possibly need to reload your USB controller drivers.
This requires inserting your Windows 7 or Vista install CD and booting to it in order to launch the Windows Repair.
This can be dangerous to the data on your C: drive and other internal drives, so attempt this at your own risk. Seagate recommends you back up your data before attempting it.
Disconnect all external storage devices such as external USB, Firewire, and eSATA drives, jump/thumb/flash drives, cameras, and printers before proceeding with a Windows repair or recovery. Failure to disconnect such devices could result in serious data corruption.
However, if the drive is not detected on the other computer either and if the drive is still not detected in Disk Management, you can begin a replacement order online, or, if the drive is fairly new, you can usually exchange the faulty unit for a replacement at your place of purchase (please contact the place of purchase for a full explanation of their policy regarding returns).