What does error message 8007000d mean when trying to update windows Phone 8 to 8.1?

[Tim Brook1]

I can download the 8.1 OS but when I try to install it it fails with error message 8007000d. Can someone advise a fix as I wish to update the HTC Windows Phone 8X

 

[aximtreo]

Give this a try. Hopefully it helps or points you in the right direction.

How to fix the error