Before trying anything else, you should start this troubleshooting guide by ensuring that the game you are trying to start or update manually is not already updating in the background. You can check this by viewing the My games & Apps Queue. If that’s not the case, you should do a power cycling procedure to clear the power capacitors and ensure that the problem is not being caused by a temporary file. And if you didn’t already try this, reinstall the game conventionally and restart your console at the end of the reinstallation. However, if the 0x80270300 error code is caused by some type of underlying OS issue, you will need to do a soft reset to refresh every operating system component and eliminate any corrupted instances.
Checking if the game is Currently Updating
As it turns out, one of the most common scenarios that will ultimately trigger the 0x80270300 error is when the user tries to launch a game that is being updated in the background. In most cases, your console should notify of this, but you can also expect to see this ambiguous error message. To verify if this potential scenario is true, you will need to check your current My games & Apps Queue to see if the game you want to launch is getting an update. To do this, follow the instructions below:
Power Cycling your Console
Another potential culprit that might end up causing this issue is corruption located inside the temp folder that your console maintains. This might end up interfering with the installation of new games or even with the launch of new games. To resolve this issue, the easiest procedure is to perform a power cycle. This will clear any temp data and drain the power capacitors (also good for resolving the majority of firmware-related issues). Follow the instructions below to do a power cycle on your Xbox One console to fix the 0x80270300 error: In case the same problem is still occurring, move down to the next potential fix below.
Reinstalling the Game
If the two potential fixes above didn’t work for you, your problem is most likely caused by a corrupted game file that ends up making the game unplayable. Several affected users have confirmed that in their case, the problem was fixed and they were able to start and update the game after they reinstalled the game conventionally. To do this, follow the instructions below to reinstall any Xbox One game to fix the 0x80270300 error code: In case you are still greeted by the same 0x80270300 error code when trying to launch, install or update a game on your Xbox One console, move down to the next potential fix below.
Soft Resetting your Xbox One Console
If none of the methods above have worked for you, likely, you’re dealing with some kind of corruption originating for your console OS files. To deal with a problem of this kind, you will need to reset every file belonging to your OS – which will also end up deleting corrupted data. Note: If you want to avoid total data loss, you can make it so that only OS files are touched by this procedure – allowing you to keep your games, applications and other types of media that you’re currently storing. Several affected users have confirmed that this operation was the only thing that allowed them to install, update, and start games without encountering the 0x80270300 error code. To enforce this fix, follow the instructions below:
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