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Windows Update unable to install updates (Error 0x80070643)


cgthamm

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Seems that a problem with component store corruption exists in Windows 10 Insider Preview Build 14251. Windows Update cannot install any updates, and returns error 0x80070643 every time it attempts to do so.

 

I have found a way restore normal Windows Update functionality. Follow the instructions here to make a bootable Windows 10 ISO. You can then burn it to DVD or you can use Rufus, available here, to make a bootable USB memory stick from the ISO. Either way, you need to boot from the new medium.

 

Once booted, you click on Troubleshoot, (you may then have to click on Advanced) and then click on Command Prompt.

 

Now you need to find the drive that your computer mounts as C: when Windows is running. Type:

dir C:\windows*.*

 

If you get a windows directory, type:

dir C:\program*.*

 

If you get at least one Program Files directory, you've found the correct drive letter. If both of these directories don't exist, replace the C: with a D: in the above commands and try again. Then E:, F:, until you find your Windows drive.

 

In my case, my Windows drive was mounted as drive D:, so I'm going to use that in the rest of the instructions. Replace the D: in the commands below with {your drive letter}:

 

Now, type:

md D:\temp

(You can ignore any error saying the directory already exists.) Next, type:

dism /image:D:\.\ /cleanup-image /scanhealth /scratchdir:D:\temp

 

(It should tell you that the component store is repairable.) Next, type:

dism /image:D:\.\ /cleanup-image /restorehealth /scratchdir:D:\temp

 

(It should tell you that the operation completed successfully.) Finally, type:

exit

 

and restart your computer. You will notice that Windows Update is again able to install updates.

 

NOTE: These instructions may also fix component store problems in other Windows 10 builds, and in Windows 8.1. They are not likely to cause further problems (and so are worth a try if you're having component store problems).

Edited by cgthamm
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