Windows Error 0x800F0922 — What It Means

Getting Windows error 0x800F0922 when updating? This update failure is commonly caused by a full System Reserved partition. Learn how to identify and fix it.

When did this appear?

During Windows Update

Windows can't reach the update server, or your System Reserved partition is too small.

Next step: First try: Settings → Windows Update → Advanced options → Delivery Optimization → turn off 'Allow downloads from other PCs'. Then retry the update.

After a failed or stuck update

A partially-installed update left Windows in an inconsistent state.

Next step: Open Command Prompt as administrator and run: DISM /Online /Cleanup-Image /RestoreHealth — then run: sfc /scannow — then retry Windows Update.

Frequently asked questions

Is Windows error 0x800F0922 a serious problem?
It is not a hardware problem or security issue, but it does mean a Windows update failed to install. The most common cause is that the System Reserved partition (the small hidden partition Windows uses for boot files) does not have enough free space to apply the update.
What is the System Reserved partition?
It is a small hidden partition (typically 100–500MB) that Windows creates during installation. It stores boot files and recovery tools. Windows updates sometimes need to write files to this partition. If it is full, updates that require it will fail with 0x800F0922.
Will this fix itself after the next update?
Unlikely. If the System Reserved partition is the cause, the error will recur with any update that requires changes to it. Freeing space on the partition (or expanding it using a partition tool) is required to permanently resolve it.
How do I check if the System Reserved partition is full?
Open Disk Management (search for it in Start). Look for a partition labelled 'System Reserved' — it is usually 100–500MB. Right-click and choose Properties to see free space. If it shows 0 bytes free or very little, that is likely the cause of 0x800F0922.
Upload your screenshot for a specific explanation →