Windows 10 April Update KB2267602 triggers 0x80070643 errors [FIX]

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Updated onOctober 4, 2023

updated onOctober 4, 2023

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The long-awaitedWindows 10 April Update is liveand thesaga of errors just started. Microsoft also rolled outKB2267602which is a new definition update for Windows Defender Antivirus. The official description for this update reads as follows:

Install this update to revise the definition files that are used to detect viruses, spyware, and other potentially unwanted software. Once you have installed this item, it cannot be removed.

Unfortunately, KB2267602’s install process often fails witherror 0x80070643. This is actually anold Windows Defender errorthat’s been around for a few years now. It’s extremely surprising that it still affects users even to this day.

Windows Defender update KB4052623 has been failing to install with error 0x80070643 for monthsI have tried all the things i could find online, including “sfc /scannow”, trying to install the update with Windows Defender disabled and run the update troubleshooter, i’ve tried running wumt and loads of other things. My Windows is clean and i have no other antivirus, and i don’t want to refresh my installation. How can i fix this problem?

Sinceerror 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:

For step-by-step instructions on how to fix error 0x80070643, check outthis 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.

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Windows 10 April Update KB2267602 triggers 0x80070643 errors [FIX]