Fix Failed to install Windows 10 update KB3081704 Error 0x80070643

Many users who recently upgraded their Windows 7 or Windows 8.1  devices to Windows 10 are getting failed installation error while running Windows Update. KB3081704 and KB3081424 are some of the first updates that Windows 10 has received. However many users are unable to failed to install the KB3081704 update due to an Error 0x80070643. Fortunately, after a thorough research, I have found an easy fix for those who cannot install Windows 10 update due to various error codes. You just need to go to the registry and make a small tweak.

How to fix Windows 10 update install error 80070643 KB3081424  KB3081704  and other similar error codes

I tried several time to install the Windows 10 update but failed

This is the format of the error I got while trying to install this Windows 10 update:

Update for Windows 10 for x64-based Systems (KB3081704) - Error 0x80070643

Here are the easy steps to fix it:

  1. Click Start >> Type “regedit” in the search bar >> Press enter 
  2. Scroll down and locate this registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\BackupRestore\FilesNotToBackup 
  3. If you cannot find the “FilesNotToBackup” subkey you have to add it. To do this: 
    • Right click on Backup Restore >> Select "New" >> Click “Key” 
    • Type FilesNotToBackup >> Press Enter 
  4. If FilesNotToBackup is already there, close regedit 
  5. Click Start >> Type services.msc >> Click OK 
  6. Double click Background Intelligent Transfer Service 
  7. Under the General tab, Click Start.
    • Note: If it’s already on start, click stop and then again click start
Windows 10 update successfully installed :)

Now your Windows 10 update will be successfully installed. You can use the same method if you get similar update errors in the future. This method also solved error code 0X80246008. If it worked please let us know about it.

Check these screenshots if you are confused in the above steps.

Step 2 :  Finding "FilesNotToBackup" in Regedit

Step 6: Adding starting Background Intelligent Transfer Service



I fix errors or at least try to...

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