Windows won’t start

PC won't start after upgrading to Windows 11

After upgrading from Windows 10 to Windows 11, the computer fails to boot properly, showing errors, a black screen, or repeated restarts, even though it worked before the upgrade.

Difficulty
Intermediate
Time
30–120 minutes
DIY cost
$0
Pro cost
$100–$200

Symptoms

  • Worked fine on Windows 10 before upgrading
  • Boot failure started right after the Windows 11 upgrade completed
  • May show driver-related errors or a black screen after the logo
  • Sometimes settles into a boot loop

Likely causes

  • CommonDriver incompatibility with Windows 11Older graphics, storage, or fingerprint reader drivers sometimes aren't fully compatible.
  • CommonHardware not fully meeting Windows 11 requirements (TPM, Secure Boot)Marginal hardware can boot into the upgrade but then behave unpredictably.
  • PossibleInterrupted or incomplete upgrade processA forced shutdown during upgrade can leave the system half-migrated.
  • PossibleThird-party security or system utility software conflictOlder utilities may not be compatible with the new OS version.
  • Less commonCorrupted upgrade filesA bad download or corrupted installer can cause upgrade-time issues that surface at boot.

What to do

  1. Interrupt startup 2–3 times to reach Windows Recovery Environment.
  2. Under Troubleshoot > Advanced options, choose 'Uninstall updates' or specifically 'Go back to the previous version of Windows' if it's within 10 days of upgrading.
  3. If rolling back isn't available, try Safe Mode and check Device Manager for drivers with warning icons, updating them from the manufacturer's site.
  4. Run Startup Repair from the Recovery Environment if rollback isn't an option.
  5. If Startup Repair fails, use System Restore to a point before the upgrade, if available.
  6. Once stable, verify your hardware meets Windows 11's minimum requirements (TPM 2.0, Secure Boot, supported CPU) before attempting the upgrade again.
  7. If the PC doesn't fully meet requirements, consider staying on Windows 10 (with extended support options) rather than repeating the upgrade.

Tools and parts

  • Bootable Windows recovery USB drive

When to call a pro

If rollback and repair options are exhausted and the hardware seems borderline for Windows 11, a technician can help evaluate whether a clean install or staying on Windows 10 is the better path.

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.