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Windows 11 26H1 System Microsoft Store Cannot Open.
After several days of debugging, I have completed system optimization, driver installation, essential software configuration, firewall settings, and various system configurations for Windows 11 26H1....
It sounds like you've done extensive troubleshooting on Windows 11 26H1, but the Microsoft Store still won't open despite resets and clean installs. Given your conclusion that the current build may have a defect, reverting to an older, more stable version is a reasonable step.