| File Extension: | BK2 |
| File Type Description: | Windows Indexing Service File |
| File Type Developer: | Microsoft Corporation |
| Primary Associated Software: | Microsoft Windows |
| Primary Software Developer: | Microsoft Corporation |
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Microsoft Corporation created the Windows Indexing Service File (BK2) file for the Microsoft Windows software series. Data from our web servers (annonymous users) show that BK2 files are most popular in China and are often used by Windows 10. In most cases, these users are surfing the internet using the Google Chrome browser.
 | Microsoft Windows by Microsoft Corporation |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .BK1 | Autodesk, Inc. | Backup Files | Autodesk Backup File |
| .FID | Microsoft Corporation | System Files | Windows Indexing Service File |
| .MDT | Microsoft Corporation | Data Files | Microsoft Access Data File |
| .ZDB | Synacor Inc. | Data Files | Zimbra Database File |
| .BMQ | Acclaim Entertainment | Raster Image Files | Re-Volt Mipmap File |
| .SIK | Microsoft Corporation | Backup Files | Microsoft Word Backup |
| .BKW | Microsoft Corporation | Graphic Files | FontEdit Image File |
| .PER | Microsoft Corporation | Game Files | Age Of Empires Personality File |
| .AI | Adobe Systems Incorporated | Vector Image Files | Adobe Illustrator File |
| .CC | Don Ho | Developer Files | C/C++ Source Code File |
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