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Fix CHKDSK Error 766f6c756d652e63 3f1 in Windows

The most common error that occur during CHKDSK execution in Windows 7 is "An unspecified error occurred (766f6c756d652e63 3f1)". This article explains when this error message is encountered, what can be the reasons & possible solutions for the issue.

When this error 766f6c756d652e63 3f1 occur?

This unspecified error 766f6c756d652e63 3f1 is mostly encountered during the execution of "chkdsk /r /f C:" command. Besides, you can see the same error while rebooting or booting the system.

an unspecified error 766f6c756d652e63 3f1

Causes of CHKDSK 766f6c756d652e63 3f1 Error

Some of the reasons are listed below for an unspecified error code 766f6c756d652e63 3f1 while running Check Disk:

Some system files or CHKDSK-related files got damaged by any malicious program.
Indication of Hard Disk failure.
Recently made changes to a system like a newly installed software, which may not be compatible with the OS.
Deletion of Windows CHKDSK related files accidentally.
Installation of a program during CHKDSK is running.
Corruption in Windows registry file.

How to resolve an unspecified error occurred in Windows

There are some solutions that can fix error code 766f6c756d652e63 3f1 in Windows 7, 8, XP, Vista when running CHKDSK:

Run Windows Check Disk- Start a command prompt & execute the following CHKDSK command to repair the issues related to a file system structure or a hard disk. chkdsk d: /f
Run System File Checker- Start a command prompt & execute the following System file checker command to scan system files & replace damaged files with a cached copy.
Sfc / scannow
Go for System Restore option that will undo all the changes you made recently that causes the unspecified error. It will help you in reverting to a previous healthy state.

Is your system still in an unhealthy state: What now?

After going through all the above steps, if you still find an unspecified error 766f6c756d652e63 3f1 on startup that means your computer is in an unhealthy state & your computer files are either highly corrupted, damaged or lost. Moreover, they cannot be recovered by CHKDSK or other system utilities. As a result your data can be lost in a wink. So you must go for the alternative i.e. CHKDSK file recovery tool that helps you in recovery of lost CHKDSK-related files, deleted data & inaccessible files.