This Windows Error encounters 0x80070643 can be a frustating issue while downlaoding or installing windows updation server . Follow the given below troubleshooting steps to solve this windows Error
Run Windows Update Troubleshooter:
Start by running the built-in Windows Update Troubleshooter. This tool can automatically identify and fix common issues affecting the update process. To run it, go to Settings > Update & Security > Troubleshoot > Additional troubleshooters > Windows Update.