Microsoft working on a fix for Windows 10 0x80070643 errors


Microsoft is working to fix a known issue causing 0x80070643 errors when installing the KB5034441 security update that patches the CVE-2024-20666 BitLocker vulnerability.

While the security issue was resolved during this month’s Patch Tuesday, deploying KB5034441 on systems with a Windows Recovery Environment (WinRE) partition that’s too small will fail and mistakenly show generic ‘0x80070643 – ERROR_INSTALL_FAILURE’ error messages instead of the correct CBS_E_INSUFFICIENT_DISK_SPACE error.

As a workaround, until a fix is available, the company provides customers with affected systems detailed—and quite complex—instructions on how to resize their WinRE partitions on its support website.

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