Windows 10: Windows Defender definitions reinstalled after a Factory Reset back to November 2014.

Help, please. The Windows Support is non-existent! Waited for almost 2 1/2 hours then got disconnected. Anyway, immediately after downloading and installing a Windows Update (that included an update for Adobe Flash Player) for Windows 8.1, x86 based it went into a gradual "Crash". This was between August and September, 2018 (don't remember the exact date) and quit working altogether in January, 2019. So, I had to do a Factory Reset back to November, 2014. It's working great now except I lost everything except my personal files, photos & videos, etc. I need to download & reinstall all of the definitions for Windows Defender. If I use the Update Button in Defender itself, it doesn't work. Is there another way to get them back? Would it work using the Update Catalog Website (or does it even have definitions going back that far)? I realize this would be a huge amount of data and might take more that a day to complete (I'm sure that's why the Update Button in Defender doesn't work). I'm hoping someone out there can help; I'm also sure I'm not the only one to have this problem. I'm sure not getting any help from Microsoft (even tho they've essentially caused the problem, but would never admit it or accept responsibility). Thanks to anyone that can help.

:)

 

Definition Update for Windows Defender - KB2267602 (Definition 1.251.705.0) - Error 0x80070643

Thanks for responding to my issue and pointing to the troubleshooting instructions.

I have been through all of the first few troubleshooting steps and the issue remains.

The remaining step indicates that Windows itself is the problem and suggests Windows be restored, reset or reinstalled. I haven't yet decided which of those options would be best for my situation. I do know that I don't wish to reinstall Windows and have
to reinstall all of my applications unless that is absolutely the only viable course.

I did note that restoring from backup was not a listed option. I do have a recent backup available and could restore from that if that approach would be useful.

I also observed that when Windows Defender was opened this AM it shows that a recent (today) definition update was installed and scans run. It is not until I try to

do a manual definition update that the aforementioned problem appears.

 

Definition Update for Windows Defender - KB2267602 (Definition 1.225.3124.0) - Error 0x80070643

Hello,

With the issue description, I understand that you are getting the error code for Windows Defender Error 0x80070643. I will certainly help you.

KB2267602 is the latest Definition update for Windows Defender. I would suggest you to follow the suggestion as a workaround given by
johnhawk88 replied on 24, 2015 and check if it helps.

Definition Update for Windows Defender - Error 0x80070643

If issue persists you may try the steps given below and check if it helps.

Method 1: Windows Update troubleshooter.

Run the Windows Update troubleshooter to try and fix the issue. Refer to the link to run the troubleshooter:

I request you to run the Windows Update Troubleshooter and check it helps.

• I search bar Type Troubleshooter and click on
  Troubleshooting;
• Click on the Find and Fix problems tile and then click on the
  view all button the left pane.
• Click on the Windows update
  troubleshooter and run it.

Method 2: Reset Windows Update components
and test the issue.

I suggest you to reset Windows Updates Components. Resetting Windows Update Components and the Windows Update files helps to fix Windows Update errors.

http://support.microsoft.com/kb/971058

Disclaimer: Important this section, method, or task contains steps that tell 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.

Backup the registry:
http://support.microsoft.com/kb/322756/en-us

Note: To reset the computer to normal mode after troubleshooting, please refer to “How to reset the computer to start as usual”
from the above article.



If the issue persists, I would suggest you to manually download the latest definition updates for Windows Defender.



How to manually download the latest definition updates for Windows Defender

http://support.microsoft.com/kb/923159

Hope this information helps. Please let us know if you need any other assistance with Windows in future. We will be happy to assist you.

 

stuck at installing update [Definition Update for Windows Defender - KB2267602 (Definition 1.213.1075.0).]

Hello,

Thank you for posting the query on Microsoft Community. I am glad to assist you on this.

Try to update Windows Defender manually and check.

Here are the steps:

• 
  Press Windows key, type Windows Defender
  and hit Enter.
  
• 
  Click on Update and try to update from there.
  

If this doesn't help, I would suggest you to follow the suggestions provided by
Ronnie Vernon on November 3, 2015 and see if it helps in resolving the issue.

Windows defender /down load stuck

Hope this helps. Please do let us know if you need any further assistance.

Thank You.