What should I do if Win10 official version 10586.318 fails to update?

Win10 official version of the 10586.318 update failed? Microsoft's Win10 official version of the 10586.318 update KB3156421 this week will cause problems in some user systems, the specific performance is that the computer is running slow, or simply can not be successfully installed. For slow computer problems, Microsoft recommends that users temporarily turn off Cortana to ease symptoms; for users who cannot install updates, you can manually download and install patches.

At present, Microsoft has not announced the specific reasons for the problem, so the official solution has not yet been released. However, some enthusiastic users try to manually install the patch to solve the problem of automatic installation failure. This approach has been proven several times to resolve some of the automatic update installation issues, possibly because manual installations can skip some of the issues that cause problems.
The user who encountered the problem can't stop the update program, so it will fall into the update → failure → then update → then fail → … … the infinite loop, users can manually download the update patch in the link below, Follow the prompts to complete the installation.
KB3156421 Download: 32-bit (390.82MB)