According to other users that have also encountered this problem, there are several different causes that might end up producing the System Error E105 on Xbox One:
Performing a Power Cycling procedure
Before you explore any other fixing strategies, you should start by clearing the temp folder on your Xbox One console in order to remove any type of corruption that was generated passively by your system’s OS. The most effective way of doing this is via a power cycling procedure. On top of clearing the temp folder, this operation will also drain the power capacitors which will end up resolve a myriad of HDD issues that might contribute to the apparition of the System Error E105 issue. Here’s a quick step by step guide that will allow you to perform a power-cycle operation: In case you still end up seeing the “System Error E105″, move down to the next potential fix below.
Update console’s firmware manually
It’s also possible that you are seeing this error due to a firmware inconsistency that might occur after an unexpected system shutdown. As it turns out after this might end up causing some firmware issues that might inhibit your console ability to boot. If this scenario is applicable, you should be able to fix the problem by overriding the current firmware with the latest version available on Microsoft’s official download website. This operation was confirmed to be successful by several users that were also encountering the System Error E105. In case this scenario is applicable to your current situation, follow the instructions below to update your console’s firmware manually, and override the current OS version on Xbox One:
Restore Xbox One to Factory State
If power-cycling and updating your Xbox One console didn’t allow you to fix your particular instance of the System Error E105, you might be actually dealing with some type of persistent corrupted data that might have been affected by an update interruption or by a power surge. The bottom line is if you’re dealing with a persistent corrupted OS file, updating your firmware will not get the issue resolved. In this case, your only hope at fixing the issue (if it’s not hardware related) is to a deep factory reset using the Startup Troubleshooter menu. IMPORTANT: Keep in mind that this operation will end up erasing every installed game, application any data associated with your Xbox Live account (including save games). If your data is not yet backed up and you can still start up your console, we encourage you to boot your console and save you data first before following the instructions below. If you’re willing to restore your Xbox One to its Factory state and you understand the consequences, follow the steps below to achieve this via the Startup Troubleshooter menu: Once your Xbox One console is returned to its factory state, attempt to start it up conventionally and see if the issue is resolved. If you still end up seeing the System Error E105 during startup or you got a different error during the process of reverting your console to the factory state, move down to the next section below.
Replace HDD (sent for repairs)
Keep in mind that System Error E105 is code for an HDD issue – If none of the fixes below have worked for you, you’ve essentially eliminated every firmware and OS issue that might trigger this behavior. So if you have reached this method with no resolution, you can safely assume that you are dealing with a hardware issue originating from your HDD. If you’re encountering the issue with an external HDD or SSD, disconnect it from your console and see if the error disappears while you attempt to boot from your in-house storage device. However, if you’re encountering the System Error E105 problem with a built-in HDD, you have little choices other than reaching out to MS to set up a repair ticket. You can do this from this link (here). If you’re not under warranty, you can either pay for the repairs or you can take your console for investigations in your local area.
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