What is DISK-READ-ERROR?
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.
Common Causes
- Defective disk or cable
- Corrupted MBR
- Bad boot sector
- Allowed SATA cable
Step-by-Step Fix Guide
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1
Reconnect the SATA/NVMe cable
Most reports of DISK-READ-ERROR clear up after Reconnect the SATA/NVMe cable, so it's worth trying before anything more involved.
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2
bootrec /fixmbr and /fixboot
A second occurrence often means a less common storage instability cause is at play, which later steps address.
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3
Run Startup Repair from USB
Try "Run Startup Repair from USB" next if the issue persists — it addresses a secondary cause.
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4
Check the disk in another PC
"Check the disk in another PC" is worth trying when defective disk or cable turns out to be the culprit.
Commands & Diagnostics
bootrec /fixmbr
bootrec /fixboot
chkdsk C: /f /r
Frequently Asked Questions
DISK-READ-ERROR is most often triggered by defective disk or cable. Other reports point to corrupted MBR, bad boot sector and allowed SATA cable as contributing factors.
Try "Reconnect the SATA/NVMe cable" first — it resolves most DISK-READ-ERROR cases on its own. Only work through the rest of the guide above if it comes back.
DISK-READ-ERROR is rated critical severity in our database. It's worth acting on quickly rather than letting it recur.
You shouldn't need to. Work through the guide above first — a reinstall is only worth considering if none of those steps help.
Open CrystalDiskInfo (free tool) to check your drive's S.M.A.R.T. status. Any yellow or red indicators — especially reallocated sectors or pending sectors — confirm the drive is degrading and should be backed up and replaced immediately.
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