Hey there when I boot up my Xbox 360, it says "system update failed. Status code...

You could try clearing the system update from the 360.

First of all, understand that clearing system updates on an Xbox 360 isn't going to fix every problem that the console has. Mainly, this fix is for when your Xbox 360 won't boot up or gives an error message when it tries to boot, AND you've recently updated
the system software for the console. Don't confuse system software updates with individual game updates; we're not talking about the message that pops up saying you'll be signed out of Xbox Live if you don't update a certain game. This is the entire console's
system software, and when it gets screwed up, it causes problems that need to be fixed.

It's pretty easy to clear failed system updates; hold the sync button down on your Xbox 360 console. It's the little white button that you typically press to link the system to wireless controllers. Keep holding it down, and press the power button to boot
the console. Do not let go of the sync button at any time. The console should completely boot up, and in the process, it will delete the new, failed system update, allowing you to boot your console and try to re-download the system update that you need.

@SKRILLEX BASS - Please let us know the status code that is coming up when you try to download the update and it fails. Alternatively you can try to manually download the update by following the directions written

here.

Error code E66 contains the following message:

System error. Contact Xbox Customer Support.

Status code: E66

If you get this message and error code, it means that the Xbox 360 console you’re using has been modified or tampered with. This means that the console is no longer able to connect to Xbox LIVE, download system updates, or play new games that require system
updates.

Try this...

Clear Any Failed system updates that cause the console to error.

1. With the console off, press and hold the sync up button (the small one which you connect the pad with)

2. While holding the sync button press the power button to turn on the console

3. Continue to hold the sync button until the Console has booted up completely.

4. During the boot process the console should clear any failed updates, allowing you to use it normally.

Let me know if this helps at all.

My Xbox 360 is showing a message saying update failed can't download the update status code 4451-4476-1780-2446-C810-1004

Hi XBF Steven R

It didn't work...

when i try to start the system update it says this code

Status Code:

4476 - 0000 - 0080 - 0300 - 8007 - 2751

I honestly don't know what that means... Also when I try to connect to the internet it says this as well.

Network: Connected

Internet: Failed

Xbox Live: Blocked

It's also showing that the live status are up so idk what's going on...