How to Fix 0x800B0101 When Updating Windows
The 0x800B0101 error is one of the most common Windows errors. It typically appears during Windows Update, system setup or when installing drivers, and it is usually caused by corrupted system files, blocked services or network problems. Follow the fixes below in order; most users resolve it within 30 minutes.
What causes the 0x800B0101 error?
The 0x800B0101 error usually points to damaged Windows Update components, incorrect system time, a full system drive or security software blocking the connection. Occasionally it follows a failed update that left services in a half-configured state.
Fix it now
1. Run SFC and DISM scans
Open Command Prompt as administrator and run sfc /scannow. If issues are found, follow up with DISM /Online /Cleanup-Image /RestoreHealth. Restart your PC afterwards.
2. Run System Restore
If the error started recently, restore Windows to a point before the problem appeared via Control Panel > Recovery > Open System Restore.
3. Free up disk space
Windows updates need room to install. Use Storage Sense or Disk Cleanup to free several gigabytes on the system drive, then retry.
4. Reset the Windows Update components
Open Command Prompt as administrator and run: net stop wuauserv, net stop cryptSvc, net stop bits. Then rename the SoftwareDistribution and Catroot2 folders, and restart the services with the matching net start commands.
5. Check your system date and time
A wrong system clock breaks secure connections and can trigger update errors. Set time and time zone to automatic in Settings > Time & Language, then sync.
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Frequently asked questions
It usually points to corrupted system files, blocked update services, network problems or a full disk. The fixes in this guide cover all the common causes.
No. It is a software-level error that prevents an update or feature from running. It will not damage your files or hardware.
The fixes here keep your files. The Media Creation Tool repair reinstalls the OS, but it keeps your files and apps.