Windows won’t start

Windows Recovery Environment (WinRE) won't load

Trying to access advanced startup options or Windows Recovery Environment (by holding Shift while clicking Restart, or after repeated failed boots) fails, freezes, or loops back to a black screen instead of showing the recovery menu.

Difficulty
Advanced
Time
30–90 minutes
DIY cost
$0
Pro cost
$100–$200

Symptoms

  • Advanced startup / troubleshoot menu never appears
  • Screen goes black or restarts when trying to enter recovery
  • Even repeated failed boots don't trigger automatic recovery
  • May follow disk errors, low disk space, or a corrupted recovery partition

Likely causes

  • CommonCorrupted or missing recovery partitionWinRE lives on a separate small partition that can become damaged or get deleted.
  • CommonDisk errors preventing recovery tools from loadingThe same underlying disk problems that block Windows can block WinRE too.
  • PossibleWinRE disabled or misconfiguredSome systems have WinRE turned off, especially after manual partition changes.
  • PossibleLow disk space preventing recovery tools from runningWinRE needs some free space to operate and can fail silently without it.
  • Less commonOutdated or incompatible WinRE version after a Windows updateOccasionally an update updates Windows but not the recovery partition to match.

What to do

  1. Instead of relying on the built-in recovery partition, create a Windows installation/recovery USB on another computer using the Media Creation Tool.
  2. Boot from that USB directly (you may need to change boot order in BIOS) to reach a working set of recovery tools regardless of the internal partition's state.
  3. From the USB's recovery environment, you can run Startup Repair, System Restore, Command Prompt, or Reset this PC just as you would from the internal recovery partition.
  4. If you can get to a working desktop at all, check WinRE status by running 'reagentc /info' in an administrator Command Prompt; it should say enabled.
  5. If it shows disabled, and you have access to a working desktop, run 'reagentc /enable' to try to restore it.
  6. If the recovery partition was deleted or resized away, it typically needs to be recreated using installation media rather than repaired in place.
  7. Prioritize backing up files first if the underlying disk shows any repeated errors, since a failing disk is a common root cause here too.

Tools and parts

  • Bootable Windows installation/recovery USB drive, created on another PC

When to call a pro

If a USB-based recovery environment also fails to run tools properly or reports disk errors, have a professional evaluate the drive for failure before attempting further repairs.

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.