Error 0x80070bc2 when Windows 10 update trying to install KB4048955 for version 1709

Hello,

Open administrative Command Prompt and type following commands one-by-one followed by Enter key.

net stop wuauserv

net stop cryptSvc

net stop bits

net stop msiserver

Ren C:\Windows\SoftwareDistribution SoftwareDistribution.old

Ren C:\Windows\System32\catroot2 Catroot2.old

net start wuauserv

net start cryptSvc

net start bits

net start msiserver

Close Command Prompt and see if the updates works then.

Hope this helps, Good luck!

After a lot of trying, and thinking, I realized that there was a pattern on the problem...I never got to see the Updating windows + 20%...40%...100% etc animation. So, on my mind the problem was not the update, it was sth related to restarting the machine, maybe some processes were blocked, so I did these:

Defina os serviços associados ao Windows Update como início automático:

1. Pressione as teclas Windows+Q e digite CMD;

2. Clique com o botão direito do Mouse sobre CMD e selecione Executar como Administrador;

3. Cole os comandos abaixo um a um, e para processá-lo, pressione Enter:

SC config wuauserv start= auto [Enter]

SC config bits start= auto [Enter]

SC config cryptsvc start= auto [Enter]

SC config trustedinstaller start= auto [Enter]

4. Reinicie o sistema.

In English, open CMD as administrator, an type one by one:

SC config wuauserv start= auto [Press Enter]

SC config bits start= auto [Press Enter]

SC config cryptsvc start= auto [Press Enter]

SC config trustedinstaller start= auto [Press Enter]

Then I rebooted and tried Windows Update and finally it downloaded (as always) but when Installing + restarting, windows update animation was back, before restarting the OS, and immediately after turning on. 

Now, my problem was not only limited to the KB versions mentioned here, I could not even install a normal flash update, all of them showed as installed on Programs and Features BUT WITH NO DATE, and windows version didn't upgrade ether in the About settings Windows.

So give these a try, as I said, my problem was not updates (because it happened with all of them), it was related to the system not restarting properly (or with some processes missing), therefore updates installation never went well.

Hope this helps!

This procedure seems to have reset the history of the recent updates, after which it tried to install the KB4048955 cumulative update again but failed again to install with the same error - Failed to install on 21/11/2017 - 0x80070bc2. 

If I go to Windows specification I still see 16299.15 OS Build, Version 1709.

However, If I go to Control Panel, Programs and features, View Installed updates ...  it now shows Security Update for Microsoft Windows (KB4048955) as if it were installed, but under the column "Installed On" it does not show any date (this happened also in the past few days but after a while it disappeared from View Installed updates).

After a bit, if I go to Windows All Settings, Update and Security, View Installed Update history, it shows KB4048955 - Requires a restart to finish installing.  So it went back to the loop it was before.

Could you try installing the latest Cumulative Update KB4048955 (OS Build 16299.64), which is known to fix many of these problems?

You can manually download it at:

http://catalog.update.microsoft.com/v7/site/Sea...

You can then follow the instructions in the following article install it:

https://www.groovypost.com/howto/manually-insta...