
TutorialWindows Update
How to Fix Windows Update Error 0x80070020 on Windows 10 and 11
Windows Update error 0x80070020 is a file sharing violation that blocks updates from installing on Windows 10 and 11. Here's how to fix it, step by step.
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Windows Update error 0x80070020 is a file sharing violation that blocks updates from installing on Windows 10 and 11. Here's how to fix it, step by step.

Remove the Windows.old folder safely using Storage settings, Disk Cleanup, or PowerShell, and reclaim 10 to 30 GB of disk space after a Windows upgrade.

Microsoft released KB5075904 on March 11, 2026, the March Patch Tuesday cumulative update for Windows 10 and Windows 11. It patches 47 vulnerabilities including 8 critical CVEs, fixes Windows Hello errors, and improves network and memory performance.