What dose this have to do with system update

Hi there! I'm more than happy to help you!

Based on the description you provided, it seems your console has a system update error. I would highly recommend you perform an offline system update. Here's how:

To use the Offline System Update, you'll need:

A Windows-based PC with an Internet connection and a USB port
A USB flash drive with a minimum of 6 GB of space formatted as NTFS

Most USB flash drives come formatted as FAT32 and will have to be reformatted to NTFS. Note that formatting a USB flash drive for this procedure will erase all files on it. Back up or transfer any files on your flash drive before you format the drive.

To perform the update:

Plug your USB flash drive into a USB port on your computer.
Open the Offline System Update file OSU1.

OSU1 https://support.xbox.com/en-US/help/hardware-network/console/offline-system-update (You can download the update here at this link under 'OSU1")

Click Save to save the console update.zip file to your computer.
Unzip the file by right-clicking on the file and selecting Extract All from the pop-up menu.
Copy the $SystemUpdate file from the .zip file to your flash drive.

Note: The files should be copied to the root directory, and there shouldn't be any other files on the flash drive.
Unplug the USB flash drive from your computer.

Then bring up the Xbox Startup Troubleshooter, and follow these steps:

Power off your console, and then unplug the power cord to ensure that the console is completely powered off.
Wait 30 seconds, and then plug the power cord back in.
Press and hold the Pair button (located on the left side of the console) and the Eject button (located on the front of the console), and then press the Xbox button  on the console.

Note: The Xbox Series S and the Xbox One S All-Digital Edition do not have Eject buttons. You can bring up the Xbox Startup Troubleshooter on these consoles by holding only the Pair button (steps 3 & 4) and then pressing the Xbox button .
Continue holding the Pair and Eject buttons for 10-15 seconds.

Listen for two “power-up” tones a couple of seconds apart. You can release the Pair and Eject buttons after the second power-up tone.
The console should power up and take you directly to the Xbox Startup Troubleshooter.

Plug the USB flash drive with the Offline System Update files into a USB port on your Xbox console. When the flash drive is inserted, the Offline system update option on the Xbox Startup Troubleshooter becomes active. Use the D-pad and A button  on your controller to select Offline system update to initiate the update using the files saved on your flash drive.

Note: The console restart may take several minutes. If you were using a wired connection, plug your network cable back into the console. If you have never connected your console to the Internet, you will need to connect at least once during your system setup process.

When the update is complete, the console will restart and you should be returned to the Home screen. If this happens, your console is now up to date! You can remove the USB drive from your console.

Thank you for your kindness and understanding! Please feel free to let me know if you need anything else.

Best Regards,
Darhyl

How to deal with a ddos attack can be found here
support.xbox.com/.../dos-attacks-faq

You can file a complaint on the user via the console and the enforcement team can investigate the issue and will probably ban him. But since DOS attacks are not done through the Live service, there really isn't anything else Microsoft can do.

I Have just downloaded Multiplayer update 3 on Battlefields on Xbox live but it still says no severs and Game version dose not match .... what can i do Thanks......

Uh oh... that shouldn't have happened. It appears you've found a glitch in the system.

what dose that mean for my xbox