Solved: 0x80090306 Error on Windows, Step by Step
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. Use the Media Creation Tool
For persistent errors, download the Windows Media Creation Tool and choose 'Upgrade this PC now'. It keeps your files and apps while repairing the OS.
2. Run the Windows Update troubleshooter
Open Settings > System > Troubleshoot > Other troubleshooters and run the Windows Update troubleshooter. It automatically detects and repairs the most common update problems.
3. Temporarily disable firewall or antivirus
Some security suites block update servers. Briefly disable third-party antivirus and Windows Defender Firewall, retry the update, then re-enable them right away.
4. 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.
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.
Related guides
Frequently asked questions
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.
Most cases take under 30 minutes. SFC and DISM scans can take longer depending on disk speed.