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Fix Microsoft Store Sync Issues Between Devices - Resolve Windows Defender Not Opening (Error 404)-Reduce Windows Defender CPU Usage via Registry

2026-06-14 20:24:37

Fix Microsoft Store Sync Issues Between Devices - Resolve Windows Defender Not Opening (Error 404)-Reduce Windows Defender CPU Usage via Registry

Result check

Keep one change per test run so you know which step helped.
Undo temporary changes after the issue is confirmed.