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I know how frustrating it is for you, but in your case, your Lenovo system files might have been broken and need to be repaired. You can try to repair it using the installation media.Kindly visit the link below to download a Windows OS installation media then proceed with a boot repair process.https://www.microsoft.com/software-download/windows10
1. In that case, you may try a hard reboot first by removing all power and turning it on again after a few minutes.
2. But if the problem still persists, then you need another computer/laptop to set up the installation media.
After installation media setup, you can use it to boot and proceed with repair the computer.
Kindly visit the link below to download a Windows OS installation media then proceed with a boot repair process.
3. I also recommend that you visit this link below for a video tutorial on how to use Windows Startup repair.