Windows Defender 404 Not Found: How to Fix Missing Interface
You open Windows Security, click on Virus & threat protection, and get a blank page or a 404 erro...
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If you see error 0x80072efd when opening Microsoft Store, it usually means the app can't reach it...
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If you see 'Proxy error' or 'Cannot sync' in OneDrive while connected through a corporate or home...
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If you see a "504 Gateway Timeout" error when syncing OneDrive, it usually means the sync service...