Hi pa1153,
According to your description, you have issues with windows update.
1. What is the OS of the computer that has update issues?
2. Please reset windows update component on the computer and install update again:
Reset windows update components:
https://support.microsoft.com/en-us/kb/971058
3. If reset windows update components couldn't help, please check windows update log which locates in C:\Windows\Windowsupdate.log.
Best Regards,
Anne
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