Physically Power off the PC by pressing and holding the power button, which will cut the powering circuit or unplug the PC.
Then get another computer and a flash drive.
Look up Windows 10 installation media.
Run it on the 2nd computer.
Install your USB Drive.
Install Windows 10 (from the media tool) on the flash drive. After it is done, close media tool, eject usb, and prepare to plug it into the main PC.
Know which key is the bios key for the main PC. Run off the USB Drive with Windows 10 bootable installation and reinstall Windows. This will 100% delete everything on the main hard drive (your storage drive) and reinstall Windows.
IF - Last Resort: You reinstalled and still have issues. THEN: Power off PC and physically remove storage drive and replace it with a new storage drive like an SSD. Repeat the same Windows 10 installation process from there with the USB Drive.
Physically Power off the PC by pressing and holding the power button, which will cut the powering circuit or unplug the PC.
Then get another computer and a flash drive.
Look up Windows 10 installation media.
Run it on the 2nd computer.
Install your USB Drive.
Install Windows 10 (from the media tool) on the flash drive. After it is done, close media tool, eject usb, and prepare to plug it into the main PC.
Know which key is the bios key for the main PC. Run off the USB Drive with Windows 10 bootable installation and reinstall Windows. This will 100% delete everything on the main hard drive (your storage drive) and reinstall Windows.
IF - Last Resort: You reinstalled and still have issues. THEN: Power off PC and physically remove storage drive and replace it with a new storage drive like an SSD. Repeat the same Windows 10 installation process from there with the USB Drive.
Good Luck!