You're welcome sheltiephil.
Also, I want to point out that you can disable the USB drivers temporarily instead of unplugging the USB devices.
Disable them temporarily before you download and install KB2862330.
After it installs successfully, re-enable them again.
This can be done using the Windows Device Manager (located in the Control Panel) in the Universal Serial Bus Controllers section. It can also be done using a utility named Autoruns (in the Drivers section) by Microsoft TechNet Sysinternals.
http://technet.microsoft.com/en-us/sysinternals/bb963902