Windows 10 update fails

Upgrade to Windows 10 Windows 10 Installation Upgrade Tutorials

Please see this: - the yellow Tips section and the basic guidance in Here's How.

Advice includes disconnecting any unnecessary peripherals, doing the upgrade after a clean boot, disabling any AV, and any disk other than the system disk.

There are logs which you can try to read and interpret.
Please also post the exact message you received.
Was the upgrade offered by Windows update, or did you try to upgrade manually?

Please also do the following:
Download and run Hard Disk Sentinel (trial) and post a screenshot of its GUI.

To post a screenshot please use the Insert Image icon above your post to the left of the video icon. Thanks.

Please also download and run Minitool Partition Wizard, expand all columns so all text is visible and post a screenshot of your partitions.

When Windows dose the update to 1703

was confusing.

Which security update please? Please post a screenshot of your Update History.
What's the exact error message?

There's a thread per security update in the News section. Please go there, find the update in question and you can read about user experiences of it, and find a link to download it manually.

There are logs which you can try to read and interpret.

Trying to find out why it failed from the Windows update logs is not straightforward. Here are some guides.
Generating the Log Files for Troubleshooting Windows Updates for Windows 10 | Windows 10 content from Windows IT Pro
Windows 10, WindowsUpdate.log and how to view it with PowerShell or Tracefmt.exe Charles Allen’s Blog
http://www.thewindowsclub.com/read-w...-in-windows-10

This may be useful once you have readable logs as a indication of what to look for. As to accessing them,the info at the start is out of date. See above.
https://support.microsoft.com/en-us/...pdate.log-file

That isn't an update (within a build). That's an upgrade to the current build. Please see my first response.

PCs are different - different mix of hardware and software. Some hardware e.g. Broadcom is apparently not compatible with the Creator's build. I assume your desktop and laptop do not have identical hardware and software.

It is not the method- the process you employ that's in question. You need to investigate the logs, follow the guidelines, obtain more information as to what went wrong.