My XBOX 360 was bought from [Mod Removed] ([Mod Removed])
Serial No. [Mod Removed]
Consule I.D. [Mod Removed]
Failed to connect to xbox Live and update
Error Code: 3F4B-4099-1781-0300=C800-0036
sorry.. You can't update a console when it was been tampered.
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1 Connect your USB drive to the USB port of your computer.
2 Navigate to the update:
www.xbox.com/system-update-usb (It's 108 MB, zipped)
3 Click Save to save the file. Zip update the console on the computer.
4 Unzip the file. If you use Windows XP, Windows Vista or Windows 7, double-click the file. Zip to decompress.
5 Copy the contents. Zip file in the root directory of your flash drive.
6 Disconnect the USB from the computer.
7 Connect the key to a USB port on your Xbox 360 console.
8 Restart the console.
9 When the console restarts, the installation program starts automatically. Select Yes when prompted to update the console software.
You can find it on this page of the Xbox:
support.xbox.com/.../xbox-360 ... ate-errors
Hey there Moon!
A lot of times this type of error pops up when the console is not in a Live supported region or the account's region doesn't match it's physical location.
Can you tell us where you're physically located and what region your account is located in?
Let us know and we'll work with you from there! =)