Windows won’t start

Windows stuck on the spinning dots loading screen

The Windows logo appears with spinning dots underneath, but the PC never progresses to the login screen no matter how long you wait. This is a general sign that something in the startup sequence is hanging.

Difficulty
Intermediate
Time
30–90 minutes
DIY cost
$0
Pro cost
$80–$180

Symptoms

  • Windows logo and spinning dots stay on screen
  • No progress after 15–20+ minutes
  • Happens on every restart attempt
  • May follow a recent update or shutdown

Likely causes

  • CommonWindows Update installing or stuck mid-updateUpdates can take a long time and occasionally hang partway through.
  • CommonCorrupted system filesDamaged files can stall the loading process indefinitely.
  • PossibleFailing hard drive or SSDA struggling drive slows or halts the read operations Windows needs at startup.
  • PossibleFaulty or recently changed hardwareA newly added RAM stick or drive can cause the loading process to hang.
  • Less commonMalware or corrupted driverSome infections or bad drivers load early and block startup.

What to do

  1. Let it run for a full 30–60 minutes the first time, since a real update install can genuinely take that long.
  2. Force a restart by holding the power button 10 seconds, then power on again to see if it progresses further.
  3. If you recently added hardware (RAM, a drive, a card), power off, remove it, and try booting without it.
  4. Boot into Windows Recovery Environment by interrupting startup 2–3 times, then run Startup Repair under Troubleshoot > Advanced options.
  5. From Advanced options, open Command Prompt and run 'chkdsk C: /f' to check the drive for errors.
  6. Try Safe Mode (Advanced options > Startup Settings > Safe Mode) to see if Windows loads with minimal drivers.
  7. If Safe Mode works but normal mode doesn't, a driver or startup program is likely the cause and can be removed from Safe Mode.

Tools and parts

  • Bootable Windows recovery USB drive

When to call a pro

If Startup Repair, chkdsk, and Safe Mode all fail to get you to a working desktop, a technician can attempt a repair install or diagnose failing hardware.

Safety

Generally low risk

Generally low risk for a careful person. Stop if anything looks different from what this guide describes.

Related guides

Operator provides AI-generated troubleshooting information. It can be wrong. For safety-critical, electrical, gas, structural, medical, automotive safety, or other high-risk problems, consult a qualified professional.