Hi Guylene. My name is Lester, and I am an Independent Advisor. I'm sorry that you are experiencing this issue. I'd be more than happy to assist you.
Did any changes occur before the issue, such as installing new software?
The message 'Cleaning up 100% complete. Don't turn off your computer usually indicates that your system is completing the installation of updates. I suggest waiting for another hour to see if there's any progress. If there's no progress, please try pressing the power button for about 5-10 seconds to perform a hard shutdown. Wait for 1-2 minutes, then boot up your computer normally to check if the issue is resolved.
I hope this information is helpful. Please don't hesitate to reach out if you have any more questions. Thank you