Unfortunately, KB2267602’s install process often fails with error 0x80070643. This is actually an old Windows Defender error that’s been around for a few years now. It’s extremely surprising that it still affects users even to this day. Since error 0x80070643 is a very common Windows Defender error code, we compiled a list of fixes that will help you solve the problem for good. Here are some of the steps you need to follow to get rid of error 0x80070643:
Install an antivirus removal tool if you used a third-party antivirus solution prior to switching to Windows Defender Clean boot your computer Restart the Security Center Service to force install the update Install the update manually Delete all the files and folders from the catroot2 folder: Launch Command Prompt as an administrator > enter the following commands: net stop wuauserv net stop bits net stop cryptsvc Go to C:\Windows\SoftwareDistribution/ C:\Windows\System32\catroot2 > delete all the files store in this folder Return to Command Prompt and type the following commands hitting Enter after each one: net start wuauserv net start bits net start cryptsvc Update Windows Defender again.
For step-by-step instructions on how to fix error 0x80070643, check out this guide. If you came across additional solutions and workarounds to solve this problem, feel free to list the steps to follow in the comments below. RELATED STORIES TO CHECK OUT:
Windows Defender won’t update [BEST FIXES] Fix: Problems While Scanning in Windows Defender (Windows 8.1/10) Fix: Unable to activate Windows Defender Firewall in Windows 10
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