Fix 0x80090306 Error in Windows Update (8 Quick Fixes)
The 0x80090306 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 0x80090306 error?
The 0x80090306 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. Clear the software distribution cache
Stop the Windows Update service, delete the contents of C:\Windows\SoftwareDistribution\Download, then restart the service and try updating again.
2. 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.
3. 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.
4. Repair the Store and system apps
Run wsreset.exe for Store-related problems, or re-register system apps from PowerShell to rebuild corrupted app packages.
5. Run System Restore
If the error started recently, restore Windows to a point before the problem appeared via Control Panel > Recovery > Open System Restore.
Related guides
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.
The fixes here keep your files. The Media Creation Tool repair reinstalls the OS, but it keeps your files and apps.
Most cases take under 30 minutes. SFC and DISM scans can take longer depending on disk speed.