No way to enter Safe Mode solution

When using a computer, the computer system fails because of software installation or hardware failure, and you can try the following two methods when Windows cannot start with Safe mode and other startup options.
First, the "Last Known Good Configuration" method
From the Windows boot menu, you can select the last known Good Configuration entry to restore the registry by:
1. When you restart the computer, hold down the "F8" key until the Windows Advanced Startup Options menu appears.
2. Use the arrow keys to highlight "Last Known Good Configuration," and then press the "enter" key.
When you select Last Known Good Configuration to start your computer, Windows restores only the information in the registry key "Hklmsystemcurrentcontrolset." Any changes made in other registry keys remain unchanged.
Second, the Recovery Console method
When you cannot start your computer, you can also run the Recovery Console from the Windows installation CD to try to fix the error:
1. Insert the installation CD and restart the computer from the CD-ROM drive.
2. Press the "R" key to select the repair or recovery option.
3. If you have a dual-boot or multiple-boot system, select the drive you want to access from the Recovery Console.
4. When a prompt appears, type the password for the administrator of the local admin account. In most cases, you will need the built-in Administrator account password to use the Recovery Console, which defaults to null.
5. At the system prompt, type the "Fixboot" command and press the "enter" key to fix the startup problem by writing the new partition boot sector to the system partition.
6. Type the "Exit" command, press the "Enter" key, exit the Recovery Console, and restart the computer.