The File Extensions Database

.000 File Extension

  • Developer by: Microsoft
  • Category: System Files
  • Format: Binary

What is an .000 file?

.000 is Indexing Service Data File

000 files are created by Indexing Service, a software component of the Windows operating system that creates a searchable file system index from files on the hard drive. The data stored in a 000 file helps Windows perform quicker searches.

000 files are saved with several other types of files that make up the search index. Other types may include .BK1, .BK2, .FID, .HSH, .PS1, and .PS2 files.

The Indexing Service search index is typically created in the following directory:

C:\System Volume Information\catalog.wci

The index may also be generated for external volumes connected to a Windows computer, such as USB flash drives.

Programs that open Indexing Service Data File
Microsoft Windows
File Type 2 Windows CE Installation Data File
Developer by: Microsoft Category: Misc Files

Index of cabinet (.CAB) files included in an installation package for a Windows CE device; referenced by the program's installer script and defines the files to be installed.

Cabinet index files also include the application name and publisher, the designated directory path for installation, WinCE software requirements, the cabinet architecture, and other information.

Programs that open Windows CE Installation Data File
File Type 3 Virtual CD Disc Image File
Developer by: H+H Software Category: Disk Image Files Format: Binary

Disc image data file created by Virtual CD, a disc imaging program; created by versions 4 and later of the software; contains the data for the disc and is saved alongside a .VC4 file; may also be saved with a .VCX file, which is the CD Editor project that was used to create the 000 and VC4 files.

000 files can be burned to a disc using Virtual CD. However, you need to open the corresponding VC4 file (or VCX file if it exists), which then allows the Virtual CD software to access the disc image.

Programs that open Virtual CD Disc Image File
H+H Software Virtual CD
Smart Projects IsoBuster
EZB Systems UltraISO
File Type 4 DoubleSpace Compressed File
Developer by: Microsoft Category: Compressed Files

File archive compressed by Microsoft DoubleSpace, an older file compression utility included with MS-DOS; can be decompressed and opened on the fly using MS-DOS with the DBLSPACE.BIN compression subsystem installed.

How to solve problems with 000 files

  • Associate the 000 file extension with the correct application. On :
    Windows: Right click on any 000 file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.000 files". Mac: Right click (or Ctrl-click) the 000 file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .000 is Indexing Service Data File. Because only the current version supports the latest 000 file format. Search, therefore, e.g. on the Microsoft manufacturer website after an available .000 is Indexing Service Data File update.
  • To make sure that your 000 file is not corrupted or virus-infected, get the file again and scan it with antivirus software.