
Restart your PC and press the BIOS key during the booting process. If you use BIOS settings for overclocking, please refer to the following brief tutorial to disable it: If you use software for overclocking, uninstalling the program can solve the problem. To solve this problem, you can disable the overclocking. Sometimes, Windows 7 won't boot, just because of improper overclocking. However, do you know overclocking may reduce the stability of accessories and shorten their service life? Many people may like to overclock their CPUs and Memory components, especially gamers. These external devices include: printers, scanners, media card readers, small media cradles (iPod, PDA, MP3 player, etc.), digital cameras and video recorders, USB storage devices, CDs or DVDs from all optical drives, docking station, etc. Therefore, please remove these devices to see whether the problem is solved. Have you connected some external devices to your PC? Have you added or replaced some hardware components in your PC? It's also possible that the "Windows 7 won't boot" problem is caused by these devices, if these devices are incompatible with your PC and interfere with the normal boot process of Windows.
Remove External Devices and Newly Installed Components