Problem
When attempting to upgrade from Windows 7 to Windows 10 using the Media Creation Tool (e.g., MediaCreationTool21H2.exe), the process may fail with the following error:
“There was a problem running this tool. We’re not sure what happened, but we’re unable to run this tool on your PC. If you continue experiencing problems, reference the error code below.”
Error Code: 0x80072F8F – 0x20000
This error typically occurs due to time synchronization issues or system integrity problems.
Solution
1. Check System File Integrity
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Click Start, type cmd.
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Right-click Command Prompt, then select Run as administrator.
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In the command window, type the following: