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Fix Windows that will not boot

We'll boot to Recovery, run Startup Repair, and fix the boot configuration—or tell you when to call a pro.

Troubleshooting · Home maintenance
30–90 min
What you'll need
  • Windows install USB (optional, if Recovery does not load)
Step 1 of 5

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Steps

Goal: Get Windows booting again.

  • Boot to Recovery.
  • Run Startup Repair.
  • Run bootrec commands if needed.

Boot to Recovery

Goal: Reach the Recovery Environment.

  • Hold Shift and click Restart. Or power cycle 2–3 times for Automatic Repair. Or boot from Windows install USB.
  • Good: Recovery loads. Proceed to Run Startup Repair.
  • Bad: Try install USB; call a pro if Recovery never loads.

Run Startup Repair

Goal: Use the automatic fix first.

  • Recovery → Troubleshoot → Advanced options → Startup Repair.
  • Good: Boot works.
  • Bad: Run bootrec and chkdsk; try System Restore.

When to get help

Call a pro if:

  • Startup Repair and bootrec do not fix it.
  • The drive has hardware errors.
  • You need data recovery.

Verification

  • Windows boots to the desktop.
  • No “Preparing Automatic Repair” loop.
  • System is stable; update Windows and drivers.

Escalation ladder

Work from the device outward. Stop when the problem is fixed.

  1. Boot to Recovery Hold Shift + Restart, or use install USB.
  2. Startup Repair Run Startup Repair from Recovery.
  3. bootrec and chkdsk Run bootrec commands; chkdsk if disk may be failing.
  4. Call a pro Reset or clean reinstall; data recovery.

What to capture if you need help

Before calling support or posting for help, have these ready. It speeds everything up.

  • What appears on screen (blank, spinning dots, error)
  • Whether Recovery loads
  • Startup Repair result
  • Steps already tried

Can you boot to Recovery?

Recovery is needed to run repair tools.

Hold Shift + Restart. Or power cycle 2–3 times for Automatic Repair. Or boot from Windows install USB. Good: Recovery loads—run Startup Repair. Bad: try install USB; call pro if no Recovery.

Yes No

You can change your answer later.

Try to reach Recovery

Power cycle: power on, wait for dots, hold power to force off. Repeat 2–3 times. Or use Windows install USB. If Recovery never loads, hardware may be failing—call pro.

Done

Did Startup Repair fix the boot?

Startup Repair fixes many issues automatically.

Recovery → Troubleshoot → Advanced → Startup Repair. Good: boot works—done. Bad: run bootrec; chkdsk; System Restore.

Yes No

You can change your answer later.

Boot fixed

Startup Repair fixed it. Update Windows and drivers. Back up data.

Done

Run bootrec and chkdsk

bootrec fixes boot sector; chkdsk fixes disk.

Command Prompt: bootrec /fixmbr, bootrec /fixboot, bootrec /rebuildbcd. chkdsk C: /f /r. Restart. If still fails, System Restore or Reset; call pro.

Done

Reviewed by Blackbox Atlas

Frequently asked questions

Why would Windows not boot?
Corrupted boot files, disk errors, failed update, or hardware failure. Boot to Recovery and run Startup Repair first.
Can I fix a PC that will not boot myself?
Yes. Boot to Recovery, run Startup Repair, run bootrec commands, or use System Restore. A clean reinstall is a last resort—back up data first.
When should I call a technician for a PC that will not boot?
If Startup Repair and bootrec do not fix it, or the drive has hardware errors. Data recovery or clean reinstall may need a professional.

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