The error code 0x80070643 in Windows 10 is associated with the April 2025 Windows Recovery Environment (WinRE) update. Microsoft has acknowledged this issue, stating that the error message is inaccurate and does not affect the update's installation or the device's functionality. This error typically occurs when the WinRE update is applied while another update is pending a reboot. After restarting your device, the WinRE update is usually applied successfully, and the error message should clear automatically during the next daily Windows Update scan. Microsoft is actively working on a fix for this issue, so there's no need for concern at this time.
Source: XDA Getting a weird Windows 10 error recently? Just ignore it, says Microsoft
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