a disk read error occurred
Moderate
Microsoft · Windows
The BIOS successfully found the boot device but encountered a read error while loading the operating system — the disk returned corrupted or no data when trying to read the boot sector
Quick Answer
Error code A Disk Read Error Occurred on your Microsoft Windows means: The BIOS successfully found the boot device but encountered a read error while loading the operating system — the disk returned corrupted or no data when trying to read the boot sector. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Power off the PC. Open the case and reseat (unplug and replug) both the SATA data cable and SATA power cable on the boot drive. Try a different SATA port on the motherboard
2
Boot from a Windows installation USB, go to Repair > Command Prompt, and run: chkdsk C: /f /r to scan for and attempt to repair bad sectors
3
Run: bootrec /fixmbr and bootrec /fixboot to repair the boot records
4
Test RAM with Windows Memory Diagnostic or MemTest86 — bad RAM can corrupt disk reads
5
Check the drive's SMART health with CrystalDiskInfo (boot from a live USB if needed) — if it shows reallocated sectors or pending sectors, back up data immediately
6
If the drive is failing, clone it to a new drive using Clonezilla or Macrium Reflect from a bootable USB
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Replacement SATA cable
Replacement SSD/HDD if drive is failing
Windows installation USB
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