Q&A for How to Reboot a Crashed Windows Computer

If no operating system is found, you should get a new operating system by downloading it and flashing it on a USB key or a disc (if the problematic computer has a disc drive), and after flashing it starting the broken computer and clicking on the correct button which will open the boot menu (the buttons can usually be found on the starting screen of the computer). From the boot menu choose the USB drive. The operating system setup will guide you from there.

Try deleting the file 'system 32' (c:\windows\System32), as this is what is causing the problem, and it will be fixed.

If you don't have your laptop plugged in, it could have run out of battery power; the battery gauge is not always accurate. Your laptop could also have gotten overheated. Wait a few minutes, make sure it is plugged in, then turn it back on again.

Make sure you back up your personal data files before the hard drive fails. (It's probably worth researching back-up software that will automatically back up your data files as you generate them so you don't have to do it manually.) The hard drive should include a partition with a new Windows installation program on it. You access the program by hitting a function key (I don't know which one though) as the computer is booting up, similar to accessing the BIOS, but using a different key. You'll get a menu that includes "Restore computer to factory-original configuration." Restoring includes formatting the C drive. Of course, if the hard drive has completely failed, it will need replacing.

Reboot the computer again and start in normal mode. Safe mode is not a program installed, like games or other software; it's a diagnostic tool.

Update to Windows 10. Windows 8 was horrible; so bad they had to skip Windows 9 to get as far away from it as possible.

Try to shut it down by pressing the power button(long press) for a few seconds and then you can try and enter safe mode. when the sign in screen appears then go to the power icon click on it hold the shift key on your pc and click on restart you will have options screen then chose restart now then press f4 in your key board and run some troubleshooting tests. in a surface go to settings > update and security > recovery > restart now. you will have options screen then chose restart now then press f4* in your keyboard and run some troubleshooting tests. *some surface tabs have keyboards.

Change your laptop battery and get another power cord adapter and try again. Remember nothing lasts forever.

It sounds like your computer is overheating. This can be for several reasons but the most common is dust build-up. Check to see that the heatsink and fans are clean of dust and are indeed functioning. if this does not solve the issue, you may need to apply new thermal paste onto the CPU. Make sure not to add too much.

The CMOS battery is connected to the BIOS. Removing the CMOS removes the power and resets the BIOS. However, since you didn't put the CMOS back, the Bios has no power and the PC cannot turn on. Putting your CMOS back should do the trick.

Your PC's operating system is corrupt or missing. Reinstall the OS with its original disk or thumb drive. If you have a backup, you may be able to restore your PC from an earlier point. But note that data after the backup will be lost.

Shut it down, try to restart your laptop. Maybe plug it in to charge, it could help it to reboot.

For that you will have to completely reinstall Windows using the installation media provided on the Microsoft website.

Open settings, system then power and sleep. Check if the amount of time until power saving is activated is above 2 or 3 minutes.

Try booting into safe mode. Press 'F8' on boot and select Safe Mode. If this does not work, then you are probably going to have to reinstall Windows.