CRITICAL_PROCESS_DIED: causes and fixes

A process that Windows cannot run without has stopped. The cause is usually damaged system files, a bad driver or a failing disk.

What you seeStop code: CRITICAL_PROCESS_DIED

What the code means

Windows depends on a handful of core processes that must run from start-up to shut-down. If one of them ends or is damaged, Windows has no safe way to continue, so it stops with this code. The message does not say which process died or why; the steps below work through the usual reasons.

Likely causes

• Damaged system files, after a power cut during an update, a forced shut-down, or disk errors.
• A faulty or mismatched driver, often for storage or graphics, installed by a recent update.
• A failing SSD or hard disk, or a loose disk cable in a desktop.
• Bad memory (RAM).
• Malware, or an over-eager security or "cleaner" program.

If Windows still starts

1. Restart once and note when it happens: at start-up, when waking from sleep, when opening one program. A pattern points to the cause.
2. Install updates: Settings › Windows Update, including Optional updates for drivers.
3. Repair system files. Open Terminal or Command Prompt as administrator (right-click Start › Terminal (Admin)) and run these two commands, one after the other. Each can take ten to twenty minutes.

DISM /Online /Cleanup-Image /RestoreHealth
sfc /scannow

1. Check the disk for errors. This asks to run at the next restart; type Y and restart.

chkdsk C: /f

1. Undo the last change: uninstall the most recent update (Settings › Windows Update › Update history › Uninstall updates) or the last program or driver you added.
2. Scan for malware: Windows Security › Virus & threat protection › Scan options › Microsoft Defender Antivirus (offline scan).
3. Test the memory with mdsched (Windows key + R).
4. If the crash appears only on waking from sleep, update the storage and chipset drivers from the computer maker's support page, and turn off Fast startup: Control Panel › Power Options › Choose what the power buttons do › Change settings that are currently unavailable.

If Windows will not start

Let it fail to start two or three times; the blue recovery screen appears. Then:

1. Troubleshoot › Advanced options › Startup Repair.
2. If that fails: Advanced options › System Restore, and pick a date before the trouble.
3. Next: Advanced options › Uninstall Updates › Uninstall latest quality update.
4. Then: Advanced options › Startup Settings › Restart, and press 4 for Safe Mode. If Safe Mode works, a driver or program is the cause; remove what was added last.
5. From Advanced options › Command Prompt you can run chkdsk C: /f and sfc /scannow /offbootdir=C:\ /offwindir=C:\Windows.
6. Last resort: Troubleshoot › Reset this PC › Keep my files. See Reset this PC.

Signs that the disk is failing

Very slow starts, files that will not open, clicking sounds from a hard disk, chkdsk reporting bad sectors, or the code returning after a clean reset. Copy your files off the disk before anything else. A replacement SSD is usually the cure.

For Windows 11 and Windows 10. Written in November 2026. Menus move between updates; use the search box in Settings if a name differs. Back up important files before any step that resets, repairs a disk or opens the computer. This is an independent guide, not connected with Microsoft.