⚠️ 3 verified solutions available for Error 777 — Last updated 2026-04-06
Error 777 📋

Fix ERROR_VERSION_PARSE_ERROR — Windows Error Code 777

Error 777 (ERROR_VERSION_PARSE_ERROR) is a Windows File & Disk error that occurs when a version number could not be parsed.. This guide provides step-by-step solutions to resolve this issue.

🏷️ Code: 777 📛 ERROR_VERSION_PARSE_ERROR 📅 Updated: 2026-04-06 ⏱️ 3 Solutions
⚡ Quick Fix

Check and Repair Disk Errors: Open Command Prompt as Administrator

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🐞 Auto-Fix Script for Error 777
⚠️ How to use: Open PowerShell as Administrator, paste the code above, and press Enter.
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📑 Table of Contents
What is Error 777? Common Causes Step-by-Step Solutions Prevention Tips Related Errors

💡 What is Error 777?

Windows System Error Code 777, known as ERROR_VERSION_PARSE_ERROR, is a File & Disk error that occurs during file system and disk I/O operations. The error indicates that: A version number could not be parsed. When this error is encountered, the Windows operating system was unable to complete the requested operation within the file management subsystem. The error code 777 is returned by the GetLastError() function and provides developers with a specific identifier to diagnose the root cause of the failure. The symbolic name ERROR_VERSION_PARSE_ERROR maps directly to this numeric code and is commonly referenced in Microsoft documentation, developer forums, and system logs. Understanding this error and its context within file system and disk I/O operations is essential for effective troubleshooting.

⚠️ Common Causes

  • System resource conflict: A version number could not be parsed.
  • The file or directory does not exist or was moved
  • Insufficient permissions on the target
  • Disk has bad sectors or is full
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An encyclopedia on the Windows Component Store: safely reclaiming disk space, understanding hard links, and fixing deep WinSxS corruption.

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✅ Step-by-Step Solutions

1 Check and Repair Disk Errors
  1. Open Command Prompt as Administrator
  2. Run: chkdsk C: /f /r (replace C: with affected drive)
  3. Type Y to schedule scan on next restart
  4. Restart and wait for the scan to complete
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2 Verify File Permissions
  1. Right-click the file/folder → Properties → Security tab
  2. Click Edit → Add your username → Grant Full Control
  3. Click Apply → OK
3 Use Windows File Recovery
  1. If a file was accidentally deleted, check Recycle Bin first
  2. Install 'Windows File Recovery' from the Microsoft Store (free)
  3. Run: winfr C: D: /extensive (scans C:, saves to D:)
  4. Check the recovered files in the output folder

🎬 Video Tutorials

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How to fix Error 777 (Version Parse Error)
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💻 Diagnostic Command

Run this PowerShell command to find related events in your system log:

Get-EventLog -LogName System -Newest 20 | Where-Object {$_.Message -like "*777*" -or $_.Message -like "*ERROR_VERSION_PARSE_ERROR*"} | Format-List

💡 Open PowerShell as Administrator, paste the command above, and press Enter.

🛡️ Prevention Tips

  • Back up important files regularly
  • Run CHKDSK periodically
  • Keep 15%+ free space on system drive
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Last updated: 2026-04-06
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Based on Official Microsoft Documentation
Solutions Tested on Windows 10 & 11
Error codes sourced from Microsoft Win32 SDK. Updated 2026-04-06.
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