This error usually happens because the System Reserved Partition (SRP) does not have enough free space for the update. Here are recommended steps to resolve it safely:

✅ Step 1: Check SRP Space

Open Disk Management (Right-click Start → Disk Management).

Locate the System Reserved Partition (usually ~100-550MB, without a drive letter).

✅ Step 2: Free Up Space on SRP (Using Command Prompt)

Open Command Prompt as Administrator.

Type:

mountvol Y: /s

This assigns drive letter Y: to SRP.

Navigate to fonts folder:

cd /d Y:\EFI\Microsoft\Boot\Fonts

Delete unnecessary language font files to free up space:

del *.ttf

(Note: Delete only fonts you are sure are not required for your system language)

Remove drive letter Y:

mountvol Y: /d

Step 3: Retry Windows Update

Restart your computer and attempt the update again.

✅ Step 4: If Still Fails – Use Third-Party Partition Tool