Windows Phone won't update: How to fix Windows Update error 80072f8f

When checking for an update to Windows Phone you may have seen the update error 80072f8f. Here's how to fix the problem. Also see: Best Windows phones

A reader wrote in to PC Advisor to ask: "I have a Nokia Lumia 1020 and I’ve been eagerly awaiting the latest Cyan release of the operating system, but when I try to check for updates I just get the following message: ‘Windows Update error 80072f8f’. Can you help?" This is how we solved their problem.

Double-check that the date and time are set correctly on your phone. This error occurs when attempting to run Windows Update while your clock is set incorrectly. Simply correcting the date and time usually makes this error go away. The same issue can also occur on desktop PCs when running Windows Update.