Why is my PC stuck on the boot screen?

The short answer

Your PC is stuck on the boot screen because something is preventing it from loading the operating system — usually a connected USB device, a failed update, or a hardware issue.

Most common causes

1. A USB drive or external device is plugged in

Your PC might be trying to boot from a USB stick, external hard drive, or even a phone plugged into USB. The computer looks for a bootable device and gets confused when it finds one that isn’t set up to start an operating system.

2. A recent update went wrong

Windows updates sometimes fail halfway through. This can leave your PC in a state where it can’t finish starting up. The same thing can happen after a driver update or a BIOS update that was interrupted.

3. Corrupted system files

If important startup files got damaged — from a sudden power loss, a bad update, or a failing hard drive — your PC won’t know how to continue booting.

4. Failing hard drive or SSD

If your storage drive is dying, your PC may hang while trying to read files from it. You might also hear clicking sounds from a traditional hard drive.

5. Overheating or loose hardware

A PC that overheats during startup may freeze to protect itself. Loose RAM sticks, a disconnected cable, or a graphics card that shifted can also cause boot hangs.

How to fix it

  • Unplug all USB devices and external drives, then restart
  • Force restart by holding the power button for 10 seconds, then turning it back on
  • Try Safe Mode — restart and press F8 repeatedly (or hold Shift while clicking Restart on Windows)
  • Check for loose cables inside the case if you’re comfortable opening it
  • Reset BIOS settings by pressing F2 or Delete during startup and loading defaults
  • Run Startup Repair from the Windows recovery menu (restart 3 times to trigger it)

When should you worry?

If your PC gets stuck on every boot attempt and none of the fixes above help, your hard drive or motherboard may be failing. Back up your data as soon as possible if you can get it to start, and consider taking it to a repair shop.