0x80070085_
System Error � Disk Change
When Windows 10/11 throws 0x80070085, the system diagnostics have flagged a condition known as "System Error � Disk Change". Most fixes for this error are straightforward and don't require wiping your drive.
What Actually Happened
Windows reported 'the disk in the drive was changed since the last access'. This usually traces back to a locked file or broken system permissions.
Symptoms
An application, File Explorer action, or system task fails with error 0x80070085
Common Causes
- The Win32 condition ERROR_DISK_CHANGE was raised: the disk in the drive was changed since the last access
- A file or folder involved in the operation is locked or missing permissions
- System file corruption affecting the component
How to Fix It
-
01
Close processes locking the resource or restart your PC
-
02
Run system repair:
sfc /scannow in an elevated Command Prompt -
03
Verify file/folder permissions under Properties > Security
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Root Cause Breakdown
0x80070085 wraps Win32 error 133 (ERROR_DISK_CHANGE), indicating the disk in the drive was changed since the last access.
Should You Worry?
No inherent risk to your data, but investigate repeated failures.
Power-User Tip
Check Event Viewer (Windows Logs > Application) for timestamp details on 0x80070085.
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