To fix Windows Update error 800705b4, use the Windows Update Troubleshooter.
If the Windows Update troubleshooter didn't correct the problem, unplug all non-essential devices, such as webcams, game controllers, and printers, unless the update is for one of these devices, and then run Windows update again. For more information on installing device drivers, see Update a driver for hardware that isn't working properly.
If you continue to see this error, go to the Microsoft Answers
website for more assistance.
Error codes this applies to: