0x800701b1
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Microsoft · Windows
A device attached to the system is not functioning. The storage device (HDD, SSD, or USB drive) is failing, disconnected, or experiencing I/O errors during the update process.
Quick Answer
Error code 0x800701B1 on your Microsoft Windows means: A device attached to the system is not functioning. The storage device (HDD, SSD, or USB drive) is failing, disconnected, or experiencing I/O errors during the update process.. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Check disk health immediately: Download and run CrystalDiskInfo (free) to view SMART data. Look for Reallocated Sectors, Current Pending Sectors, and Uncorrectable Sector Count — any non-zero values indicate drive failure.
2
Run chkdsk to check for and repair file system errors: Open Command Prompt as Administrator and run: chkdsk C: /f /r — schedule it for the next restart.
3
If using a desktop PC, shut down, open the case, and reseat the SATA data and power cables on your drives. Try a different SATA port on the motherboard.
4
Check Event Viewer > Windows Logs > System for disk-related warnings and errors (source: disk, ntfs, storahci).
5
Update your storage controller drivers: Open Device Manager > IDE ATA/ATAPI controllers (or Storage controllers), right-click your controller and choose 'Update driver'. Also check your PC manufacturer's website for storage driver updates.
6
If the drive is failing (SMART errors detected), back up all important data immediately and replace the drive. Clone the drive to a new one using free tools like Clonezilla or Macrium Reflect Free.
7
If the error occurs when writing to a USB drive, try a different USB port (use a USB 3.0 port directly on the motherboard, not a hub) or a different USB drive entirely.
Pro Tip
This issue typically requires professional diagnosis. Attempting this fix without proper training could cause further problems.
Parts You May Need
SSD/HDD replacement drive
SATA cable
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