However, it's important to mention that Windows 8.1 users must also use Control Panel, and not the modern PC settings to complete the process.
This task is especially important for "Temporary Internet Files", "Recycle Bin", and error report files.
To resolve the issue, you'll have to use a third-party software to increase the size of the System Reserved partition.
The same error code may also appear if your computer cannot connect to the Windows Update servers.
However, you can find the specific error by going to Control Panel All Control Panel Items\Windows Update\View update history.
Then double-click the update with the Failed status, to view the error details.
The error code 0x C1900208 – 0x4000C means that an incompatible app is installed on your computer blocking the upgrade process.