How do I troubleshoot my computer not booting?

What to Do When Your Computer Won’t Start

Give It More Power. (Photo: Zlata Ivleva)
Check Your Monitor. (Photo: Zlata Ivleva)
Listen for the Beep. (Photo: Michael Sexton)
Unplug Unnecessary USB Devices.
Reseat the Hardware Inside.
Explore the BIOS.
Scan for Viruses Using a Live CD.
Boot Into Safe Mode.

Can not reinstall Windows 7?

Determine whether there is a Windows.old folder and whether there is sufficient free space on the Windows hard disk. Click Start,and then click Computer.

Start the Windows Recovery Environment. Put the Windows 7 installation disc in the DVD drive,and then restart the computer.

Move the Windows 7 folders to a new Win7 folder.

What to do when Windows won’t boot?

Start Windows in safe mode. The so-called “safe mode” should always be the first resort when Windows isn’t booting as usual.

Try Windows automatic repair. If the safe mode did not work,you should try to automatically repair the system.

Restore previous Windows version.

Repair boot manager.

Reinstall the Windows operating system.

What to do when a Windows PC won’t start?

Start Windows in safe mode. The most obvious solution when Windows doesn’t start is to go into safe mode.

Disable Fast Boot in BIOS.

Disconnect all USB devices.

Reassign drive letters.

Avoid the new Windows 10 Bootloader.

Repair or reinstall Windows.

How do I boot from USB in Windows 7?

Turn on your computer, insert the Windows 7 installation disc or USB flash drive, and then restart your computer. Newer computers often display a startup (or boot) menu. On the startup menu, choose “BIOS setup,” or “BIOS settings,” or something similar. Procedures vary depending on the BIOS manufacturer.