Unable to launch Minecraft Java Edition, error code 0x803F8001

I have a list of things you could do to possible solve this issue.

1. Check & Install Windows Updates:

• Use this shortcut Windows key + I to open the Settings.
• After that, you have to choose Update & Security.
• It will open the Windows Update settings by default.
• Now, you have to click the Check for updates button.
• Then, install the updates and restart your system.

2. Run Automatic Repair:

• Use this shortcut Windows key + I to open the Settings.

• Then, you have to click on Update & Security.

• In the left pane, you have to click on Recovery.

• Now, you have to click on the Restart now button under Advanced startup.

• After that, you have to select Advanced Options ? Troubleshoot.

• At last, you have to choose Automatic Repair and wait for the computer to reboot automatically.

3. Re-register the Windows Store App:

• Go to the Start menu, search for 'powershell' in the search box.

• Right-click on the top result and choose Run as administrator.

• Now, copy and paste the below command and hit Enter.

Get-appxprovisionedpackage –online | where-object {$_.packagename –like “*windowscommunicationsapps*”} | remove-appxprovisionedpackage –online

• Reboot your PC once the process gets completed.

4. Reset the Windows Store Cache:

• You have to press the Windows key and R together to open the Run command.

• Then, you have to type the below command and click the OK button.

  wsreset.exe

• It will open the Microsoft Store along with a Command Prompt and resets the Windows Store cache.

• After this, you have to reboot your PC to apply the changes.

5. Run the DISM Command:

• Click the Start menu and type 'cmd' in the search box. Then press Ctrl + Shift + Enter to open the Command Prompt with admin privileges.

• In the Command Prompt, you have to type the below command and hit Enter

DISM.exe /Online /Cleanup-image /Restorehealth

• Run the below command and hit Enter if your Windows Update client is damaged or corrupted.

DISM.exe /Online /Cleanup-Image /RestoreHealth /Source:C:\RepairSource\Windows /LimitAccess

6. Disable the Proxy Server:

• Using the shortcut Windows key + R, you can open the Run box.

• After that, you have to type 'inetcpl.cpl' in the given space of Open and click OK.

• It will open the Internet Properties and you have to click the Connections tab.

• Click the LAN settings button.

• Select the check-box of 'Automatically detect setting' and uncheck the ‘Use a Proxy Server for your LAN’ option and click the OK button.

• Then, click the Apply and OK button in the Internet Properties window. At last, reboot your device.

7. Turn on Location Service:

• To open the Settings, you have to use this keyboard shortcut Windows key + I.

• After that, you have to choose the Privacy option.

• In the left pane, you have to click on the Location option under App permission

• Now, on the right side, you have to turn on the toggle switch under 'Allow apps to access your location'.

• Reboot your PC to save the changes.

Don't know if this will help but I also had this problem and spent like two hours trying to fix it. Anyway, the thing that fixed my issue was simply travelling to the Microsoft Store and clicking the "get" button next to the play "button." I think the problem I was having was that I had gotten Minecraft before merging my Java and Microsoft accounts. Because of this Microsoft never registered that I had bought Minecraft. The simple click made me feel stupid, but I can play Minecraft now.