Storage · critical

How to fixDISK-READ-ERROR

Disk read error at startup

What this error means

This critical-severity issue affects the storage drive (SSD/HDD). Windows reports 'A disk read error occurred' when booting. PC won't boot. The usual suspects are corrupted MBR and allowed SATA cable. See the troubleshooting steps below for the fix.

Before you begin

Save open work and back up important files. Note any recent driver or hardware changes. If Windows cannot start, use the startup guide first.

Work through these checks

0 of 4 complete
01Reconnect the SATA/NVMe cable

Reconnect the SATA/NVMe cable.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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02bootrec /fixmbr and /fixboot

bootrec /fixmbr and /fixboot.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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03Run Startup Repair from USB

Run Startup Repair from USB.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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04Check the disk in another PC

Check the disk in another PC.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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Possible causes

  • Defective disk or cable
  • Corrupted MBR
  • Bad boot sector
  • Allowed SATA cable