This is all I could find.
Windows Update error 80070103
Applies to all editions of Windows Vista.
Which edition of Windows Vista am I using?
If you receive Windows Update error 80070103 while installing updates, you might be trying to install a driver that is already installed on your computer or a driver that has a lower compatibility rating than one you already have installed. To find more information or to get help, try these options:
• If you want to install the latest driver for a specific device, program, or game, try manually updating the driver instead of using Windows Update. For more information, see
Repair or update a driver.
•Go to the
Discussions in Windows Update website to see if someone else has found a solution or to request help from other Windows users.
•Go to the
Windows Update Support Center website to try to find more information about the error code or to request support by e‑mail.
•To hide the update so it is not offered again, click the plus sign (
+) under the title of the update, and then select the
Don't show this update again check box.
Help and Support search term: WindowsUpdate_80070103
Hope this helps