Hi, I am Sandy and I look forward to help you today with the best answer possible.
I'm sorry about the issue.
Please follow the steps given below and let me know its outcome:
Turn off your computer.Disconnect the power cord from Main supply.Now, hold down the power button on the tower for 1 minute.Now, connect only power cord and restart it and try to boot in safe mode again.
And if you can take a second to rate my service, that would be greatly appreciated.