I cannot update my system.it keeps saying failed no matter how many times i press retry

You can reuse the same ISO you previously downloaded, but if you'd prefer to download it again, that's perfectly fine.

To delete the ISO, treat it like any other file: right-click on it and select "Delete". Keep in mind, if the ISO is still mounted, you won't be able to delete it right away. In that case, locate the mounted ISO in File Explorer, right-click on it, and choose "Eject" before attempting to delete it.

If you have any questions, don't hesitate to ask. Click on the "Reply" button below my reply.

Oh i see,i only performed the cleanboot followed by troubleshooting.I will perform the in place upgrade after cleanboot later.By the way,i want to clarify if the inplace upgrade would be affected by downloading 2 windows11iso.If yes,how do i delete the unneeded one?

The image you shared is from the troubleshooter.

Have you tried performing the In-place Upgrade using the Windows 11 ISO after doing the clean boot?

Was the In-place Upgrade completed successfully this time?

I await your reply. Click on the "Reply" button below my reply.

the problem still persist

No problem. Thanks.

I found some clues that may mean that third-party software in the background is what caused the problem when trying the In-place Upgrade.

Perform a clean boot and start the In-place Upgrade procedure again. Follow the instructions carefully.
https://support.microsoft.com/en-us/topic/how-t...
After the in-place update is complete, return to normal boot as instructed in "Reset the computer to start normally after clean boot troubleshooting".

If the problem persists, let me know. Click on the "Reply" button below my reply.

Feel free to ask back any questions.