ErrorFindly
0x800700B7SystemLow

Error 0x800700B7 — Already Exists (ERROR_ALREADY_EXISTS) | Windows System Error Fix

Windows 11Windows 10Windows Server 2022

What Does 0x800700B7 Mean?

Cannot create a file when that file already exists.

Real-World Causes

  1. 1Application trying to create a file or registry key that already exists
  2. 2Race condition where two processes try to create the same resource
  3. 3Installation finding leftover files from a previous install
  4. 4Restore operation encountering existing files

Symptoms

  • ⚠File or folder creation fails
  • ⚠Application installation reports item already exists
  • ⚠Registry operations fail with duplicate key error
  • ⚠Batch operations halt on existing items

DIY Fix

Beginner-friendly steps you can try at home

  1. 1Delete or rename the existing file/folder before retrying
  2. 2Clean up leftover files from previous installations
  3. 3Use overwrite mode if the application supports it
  4. 4Manually remove the conflicting registry key if applicable

Advanced Fix

For experienced users and IT professionals

  1. 1For installations, use the /force or overwrite flag if available
  2. 2Clean the registry of leftover entries from previous installations using the application's cleanup tool

Frequently Asked Questions

Is this different from ERROR_FILE_EXISTS?
They are very similar. ERROR_FILE_EXISTS (0x80070050) is returned by older APIs, while ERROR_ALREADY_EXISTS (0x800700B7) is returned by newer CreateFile API when CREATE_NEW disposition is used. The fix is the same for both.

Related Error Codes

0x80070050File Exists (ERROR_FILE_EXISTS)0x80070002File Not Found (ERROR_FILE_NOT_FOUND)

About the Author

Windows Troubleshooting Team

Verified against official Microsoft documentation and real-world diagnostic data. Error behavior confirmed across Windows 10, Windows 11, and Windows Server.