It is very frustrating to meet the update error 0xc1900204 when you attempt to patch your Windows system.
You may meet different error codes when you revamp your Windows system such as0x80248007and0x80240017.
And this post focuses on the error 0xc1900204.

Error code 0xc1900204 may appear when you install Windows, upgrade Windows and use Windows 10 Update Assistant.
But luckily, you’re able to try the methods below to get rid of the error 0xc1900204.
So you should runt this tool at first.

Now follow the instructions below:
Step 1: Press theWinkey and theIkey at the same time to openSettings.
Step 2: ClickUpdate & Securityand then navigate to theTroubleshoottab in the left panel.
Step 3: ClickWindows UpdateunderGet up and runningsection in the right panel and then clickRun the troubleshooter.

Step 5: Reboot your gear and then verify if the error 0xc1900204 is fixed.
Thus, resetting the Windows Update components may help you fix the error.
Here is the tutorial:
Step 1: Typecmdin theSearchbar and then right-clickCommand Promptto chooseRun as administrator.

Step 2: pop in the following commands in the window and remember to pressEnterafter each command.
Step 1: Press theWin + Rkeys at the same time to open theRunbox.
Step 5: Reboot your setup and then peek if the error is gone.
Therefore, you should disable your antivirus software temporarily.
And if disabling your third-party antivirus software doesnt work, then you should have a go at uninstall it.
Step 3: OpenSettingsand then clickTime & language.
If not, clickAdd a languageand install US English as a default display language.
Step 4: reset your setup and then see if the error is fixed.
Here is the tutorial:
Step 1: OpenCommand Promptas an administrator.
Typesfc /scannowin the window and then pressEnter.
Step 2: Wait for the process to complete.
This process may take some time but you should never interfere with it.
Step 4: Reboot your rig and verify if the error still persists.