Choose your USB drive from the boot menu, and it should boot into Hiren's live environment. It's possible you have some nasty malware that's preventing your computer from booting. But with a live environment like Hiren's Boot CD, you can boot your computer from a CD or USB drive and scan your hard drive for malware without booting into Windows. Enter your BIOS when the POST screen appears, usually by pressing Delete, F2, or some other key to enter setup. If you've tweaked any of these settings in the recent past, try changing them back.
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The POST on your computer might occur in the background, behind your computer maker's logo , or you may actually see frozen test results or other messages on the screen. Like in the previous scenario, don't worry about the state your external monitor is in, if you have one. You may have a monitor problem as well but it's not possible to troubleshoot it quite yet.
Your computer should then give you the option to boot into Safe Mode, Safe Mode with Networking, or Safe Mode with Command Prompt. You can try any of these, though the most minimal Safe Mode is probably your best bet, unless you need to access the internet . This will load Windows with only the most crucial drivers and services running. Download the ISO image from this page, and follow here the instructions to "burn" it to a USB flash drive. Reboot your computer and access the Boot menu—usually by pressing F11, F12, or some other key defined at startup.
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- If your PC won’t turn on but motherboard light is on, a potential culprit is the power button on the case itself or the wires connecting that button to the motherboard.
- Using this power button will turn on the system just as a properly wired power button would.
- Not all of them do; consult your motherboard manual if you’re unsure or having trouble locating it.
You might also turn off the Fast Boot feature, in case a recent Windows Update is conflicting with it. Before continuing, unplug anything superfluous from your computer—webcams, external hard drives, USB headsets. Try booting with just a keyboard and mouse to see if one of your USB devices is causing a conflict. Unplug your computer and plug it directly into a wall outlet you know is working, rather than a power strip or battery backup that may be failing.
Make sure the power switch on the back of your power supply is flipped on, and if the outlet is connected to a light switch, make sure that switch is turned on too. If your computer isn't turning on at all—no fans are running, no lights are blinking, and nothing appears on screen—you probably have a power issue. Here are some troubleshooting steps to take when your computer fails to boot correctly. If your computer won't start and you see a blue screen flash or remain on the screen, you're experiencing a Blue Screen of Death and should use the troubleshooting guide above.
It's possible some data on the drive is corrupt, preventing Windows from booting properly. Thankfully, Microsoft has a few tools that can attempt to fix the problem.