So you can try the following methods to repair, if not, it is recommended to reinstall the system:
1. Press F8 continuously when starting the computer, enter the system operation menu, select "Last Correct Configuration", and restart the computer to see if it can be solved.
2. Press F8 key continuously when starting the machine, enter the system operation menu, and select the safe mode. If you can successfully enter, click Start → All Programs → Accessories → System Tools → System Restore to open the system restore dialog box, and select to restore my computer to an earlier time. In this way, you can use the system restore function of Windows system to restore to the restore point where you can boot normally before. (If any)
3. Install the optical drive with the system, insert the optical drive, restart the computer, and enter the optical drive installation system state. After the startup interface flashes, do not choose to install the system, but choose to repair the current system (it may run for a long time, 2-4 hours), and wait patiently for the repair to be completed to see if the problem can be solved.
If the above three methods are ineffective, you can only reinstall the system.