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Today we are going to fix Windows Defender Windows Update Error 0x80070643. Make sure to uninstall any third-party antivirus or anti-malware programs first.
So, what is the cause of this Windows Defender error kb2267602 0x80070643? There are many reasons why you may encounter error 0x800070643. Here are some of the main reasons why this happens
Failed to install latest Windows updates
Damaged or corrupt operating system files.
Corrupt or damaged .Net framework.
Third-party antivirus/malware software installed.
Corrupted system registry or errors in the registry.
Virus/malware infection.
Corrupt or disabled Microsoft Ose.exe source engine
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1) Click on the Start menu.
Type “cmd”. Right-click on Command Prompt and select Run as administrator.
In the Command Prompt, type “sfc /scannow” and press Enter.
DISM/Online/Cleanup-Image/RestoreHealth
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2) Microsoft .NET Framework Repair Tool
https://www.microsoft.com/en-gb/download/details.aspx?id30135
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Reset Windows Update Components
3) Click on the Start menu.
Type “cmd”. Right-click on Command Prompt and select Run as administrator.
In the command prompt, type
dead stop wuauserv
dead stop cryptSvc
sharp stop bits
net shutdown msi server
ren C://Windows//SoftwareDistribution SoftwareDistribution.old
ren C://Windows//System32//catroot2 Catroot2.old
netboot wuauserv
netboot cryptSvc
net boot bits
msi server clean boot
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Use the Windows Defender command-line tool to update signatures
Click the Start menu.
Type “cmd”. Right-click on Command Prompt and select Run as administrator.
In the command prompt, type:
"%PROGRAMFILES%//Windows Defender//MPCMDRUN.exe" -RemoveDefinitions -All
“%PROGRAMFILES%//Windows Defender//MPCMDRUN.exe” -SignatureUpdate
/"%ProgramFiles%//Windows Defender//MPCMDRUN.exe/" -SignatureUpdate -MMPC
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Repair Microsoft Silverlight
Download the Silverlight Fix it utility from Microsoft
http://download.microsoft.com/download/6/C/9/6C970550-32AB-4235-9CDD-7FC9DD848BBB/silverlight.diagcab
Once uninstalled, download the latest version
http://www.microsoft.com/getsilverlight/get-started/install/default.aspx
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#0x80070643 #FixWindowsUpdate #FixError0x80070643 #Windows10
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