[SOLVED] Win 10 winupdate problem error defender 0x80070643

[Computerguy]

A week or so ago I came here and was helped out with a winupdate issue. Thanks for that help! I was helped so when a different update problem cropped up here I am again.
Windows update on win 10 pc.
Looks like it will not update defender with error 0x80070643. These are the updates failing. I don't see any errors in the log files. I did try and reset .net with the repair too and yielded no change

Update for Microsoft Defender antimalware platform (KB4052623)​

​

 

[Maxstar]

Hi,

Open a elevated command prompt and copy and past the following commands one at a time into the command prompt and press enter.

cd %ProgramFiles%\Windows Defender
MpCmdRun.exe -removedefinitions -dynamicsignatures
MpCmdRun.exe -SignatureUpdate

Let me know if it says it was successful or if there are any errors. Or take a screenshot of the command prompt window and paste it into your next reply.

 

[Computerguy]

I tried that the other day and got the same error if I recall. But here is today's results, failed.

 

[Maxstar]

Please run the following command and attach WDef.txt to your next post.

dir "%programdata%\microsoft\windows defender\platform" > "%userprofile%\desktop\WDef.txt"

 

[Computerguy]

output attached

 

[Maxstar]

Open a elevated command prompt and run the following commands one at a time and press enter.

"%programdata%\microsoft\windows defender\platform\4.18.2205.7-0\mpcmdrun.exe" -revertplatform
"%programdata%\microsoft\windows defender\platform\4.18.2203.5-0\mpcmdrun.exe" -revertplatform
"%programdata%\microsoft\windows defender\platform\4.18.2201.10-0\mpcmdrun.exe" -revertplatform

Let me know the result. Or take a screenshot of the command prompt window and paste it into your next reply.

 

[Computerguy]

screenshot

 

[Maxstar]

Download the

Farbar Recovery Scan Tool and save it to your Desktop:

Download the 64 bit version: - Farbar Recovery Scan Tool Link

• Note: Your antivirus program may report FRST incorrectly as an infection. If so, disable the real-time protection when downloading and running FRST.
• Right-click to run the tool as administrator. When the tool opens click Yes to disclaimer.
• Note: Ensure that the Addition.txt check box is checked at the bottom of the form within the Optional Scan area.
• Press the Scan button.
• Please wait for the tool to finish. It will produce two logfiles called FRST.txt and Addition.txt in the same directory the tool is run from (which should be the desktop)
• Post the logfiles FRST.txt and Addition.txt as attachment in your next reply.

 

[Computerguy]

attached

 

[Maxstar]

Hi,

Step 1. Run the Kaspersky Removal tool to remove the AV, VPN and reboot the system.
Step 2. Run FRST again and provide the new FRST.txt and Addition.txt in your next post.

 

[Computerguy]

attached

 

[Maxstar]

Hi,

The FRST log is incomplete, please run FRST again and post the new logs.

 

[Computerguy]

attached

 

[Maxstar]

Start the

Farbar Recovery Scan Tool again.

Warning: This script was written specifically for this system. Do not run this script on another system.

• Download the attachment fixlist.txt and save it to your desktop.
• Right-click on FRST.exe and select "Run as administrator".
• Press the Fix button.
• If for some reason the tool needs a restart, please make sure you let the system restart normally.
• When finished, a log called Fixlog.txt will appear in the same directory the tool is run from.
• Post the logfile Fixlog.txt as attachment in your next reply.

 

[Computerguy]

attached

 

[Maxstar]

Start the

Farbar Recovery Scan Tool again.

Warning: This script was written specifically for this system. Do not run this script on another system.

• Download the attachment fixlist.txt and save it to your desktop.
• Right-click on FRST.exe and select "Run as administrator".
• Press the Fix button.
• If for some reason the tool needs a restart, please make sure you let the system restart normally.
• When finished, a log called Fixlog.txt will appear in the same directory the tool is run from.
• Post the logfile Fixlog.txt as attachment in your next reply.

 

[Computerguy]

attached

 

[Maxstar]

There is a problem with registry key of the Windows Defender service, please try the following fix.

Download

SFCFix and save it to your desktop.

Warning: This fix was written specifically for this system. Do not run this fix on another system.

• Save any work you have open, and close all programs.
• Download the attachment SFCFixScript.txt and save it to your desktop.
• Drag the SFCFixScript.txt file over the SFCFix.exe executable and release it.

• SFCFix will launch, let it complete.
• Once done, a file will appear on your desktop, called SFCFix.txt.
• Post the logfile (SFCFix.txt) as attachment in your next reply.

 

[Computerguy]

attached

 

[Maxstar]

• Click the Start button and type regedit.
• When you see Registry Editor on the list, right-click on it and select Run as administrator.
• Navigate to the following registry key.
  

  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinDefend

• Rightclick on it and select Permissions.
• A new window opens, click the button Advanced.
• Please post a screenshot of this window in your next post.