Error Code 80070644, failed update installation

Question

Running a Sony Viao Laptop Win 8.1 64-bit. Anti-virus software is Avast Internet Security 2015. I am continually failing in install software updates due to the above error. Have searched the Db for this error number but don't specifically find anything addressing this error. Help! Getting extremely frustrated!

Tnx

Answer 1

Hi,

Thank you for posting your query on Microsoft Community.

As per the description, I understand that you are unable to install Windows update.

This might have occurred due to some corruptions in Windows updates.

Try the methods.

Method 1:

I would suggest you to temporarily disable the antivirus security software program installed on your computer and check if that helps.

Disclaimer: Antivirus software helps protecting your computer against viruses and other security threats. In most cases, you shouldn't disable your antivirus software. If you have to temporarily disable it to install other software and\or troubleshoot any pertinent issue, you should re-enable it as soon as you're done. If you are connected to the Internet or a network while your antivirus software is disabled, your computer is vulnerable to malware attacks.

Method 2:

I would suggest you to reset Windows update components and try to install the Windows update in a clean boot state and check if that helps.

https://support.microsoft.com/en-us/kb/971058

Disclaimer: This section, method, or task contains steps that tells you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:

322756 (http://support.microsoft.com/kb/322756/ )

 How to back up and restore the registry in Windows

Method 3:

I suggest you to perform clean bootand check, using this Microsoft Article because may be a third party application is causing this issue and try to install the update.

https://support.microsoft.com/en-us/kb/929135

NOTE: A clean boot is performed to start Windows by using a minimal set of drivers and startup programs. This helps eliminate software conflicts that occur when you install a program or an update or when you run a program in Windows. You may also troubleshoot or determine what conflict is causing the problem by performing a clean boot. You must log on to the computer as an administrator to be able to perform a clean boot. Your computer may temporarily lose some functionality when you perform a clean boot. When you start the computer normally, the functionality returns. However, you may receive the original error message, or experience the original behavior if the problem still exists. If the computer is connected to a network, network policy settings may prevent you from following these steps.

https://support.microsoft.com/en-us/kb/929135

Once you perform clean boot do refer to the section **“How to reset the computer to start normally after clean boot troubleshooting”**to boot the computer in normal mode.

---

Hope this helps. Please let us know the results. We will be glad to assist you further.