Fix 0xC03F6603 Microsoft Store error in Windows 11/10

Today we are going to look at Microsoft Store Error Code 0xC03F6603. You can face this error generally while trying to install or update games via the Microsoft Store or the Xbox game pass. This error also accompanies an error message sometimes that says, “Something went wrong on our end,” and is more observable while trying to install Sea of Thieves on Windows. So, if you’re a fan of the game and are constantly facing this error, then you would want to remediate it immediately. Let’s see what you can do to that effect.

Fix 0xC03F6603 Microsoft Store error in Windows 11/10

If you face Error Code 0xC03F6603 when trying to install an app or game via Microsoft Store or Xbox app on your Windows PC, here are some solutions to help you:

1. Run the Windows Store Apps Troubleshooter
2. Repair and Reset Microsoft Store and the Xbox app
3. Reinstall Microsoft Store
4. Change your internet connection and see
5. Passively download the game on PC

1] Run the Windows Store Apps Troubleshooter

First and foremost, you should try running the Windows troubleshooter to check if there is something wrong with the Store apps installed on your PC. Let’s see what you have to do for the same:

1. Press the ‘Win + I’ key combination to open Windows Settings
2. Scroll down a little in the System tab till you get to the Troubleshoot option. Click on it
3. Further, click on Other Troubleshooters and locate the Windows Store Apps You’ll find it among the frequent troubleshooters if you’ve found yourself using it more than most others

Click on Run, which would initiate the troubleshooting process, and soon enough, you’ll be notified if any bugs are causing the Error 0xC03F6603 to occur. Once it’s run completely, check if you’re still facing the error while downloading apps on the Microsoft Store.

Read: Fix Microsoft Store Acquiring License error

2] Repair and Reset Microsoft Store and the Xbox app

If any app troubleshooting doesn’t work for you, and even uninstalling and reinstalling is of no help to you, then you can try resetting the Microsoft Store app and the problematic Xbox app.

1. Open Windows Settings and click on the Apps tab
2. Further, select the Installed Apps tab, and in the search field type “Microsoft Store”
3. Click on the triple-dotted icon to the right of it to open Advanced Settings where you’ll have an option to Repair or Reset the Microsoft Store

First, try resetting it and checking if it is any help. Only if it doesn’t result in the error being eliminated should you use the repair option.

You can also replicate this process with the Xbox app as well as the Xbox game that is causing the issue.

Read: Fix Microsoft Store Acquiring License error

3] Reinstall Microsoft Store

Run the following command in an elecated PowerShell windows to uninstall Microsoft Storen and then fresh-install it.

get-appxpackage *store* | remove-Appxpackage

Next, run this command:

add-appxpackage -register "C:\Program Files\WindowsApps\*Store*\AppxManifest.xml" -disabledevelopmentmode

See of this resolves the issue.

4] Change your internet connection

Change your internet connection and see if that helps. You may also use a VPN software and see if that works.

5] Passively download the game on Windows

If you’re facing this issue while trying to download any game – say, Sea of Thieves – on your PC, then some users have reported that passively downloading the game has helped them work their way around the error. Here’s how you can do that:

1. Pause all existing downloads on the Microsoft Store
2. Start downloading Sea of Thieves again
3. As soon as the process starts, restart your computer

Now, don’t launch the Store app to track the download. Instead, do it from the Action Center. This will result in your game downloading without you facing Error 0xC03F6603.

Read: Complete list of Microsoft Store error codes, descriptions, resolution

How do I fix Windows Store in Windows 11?

One of the most common errors with the Microsoft Store is it not opening altogether and it may be triggered by some very menial things. Firstly, make sure that the Wi-Fi is connected to a working network. You should also take care of other things like Windows being updated to its latest version, date and time settings being accurate, etc. You can also try resetting the Microsoft Store’s cache if the issue persists.

How do I fix error code 0x80131500 in Windows 11?

Error 0x80131500 on the Microsoft Store comes with the error message “Try that again”. Some common fixes for this error include running the Windows Store Apps troubleshooter and clearing the Microsoft Store Cache. You should also check the status of the Microsoft Store Install service and restart it if it is running. If nothing else works, then you can try reinstalling the Microsoft Store app from PowerShell.