| 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 United States 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 |
| .DWFX | Autodesk, Inc. | CAD Files | Design Web Format XPS File |
| .VID | Unknown Developer | Video Files | Generic Video File |
| .CSP | RadGs Software | Web Files | Concept Server Page |
| .JAV | Oracle Corporation | Developer Files | Java Source Code |
| .PP | Geckonization | Data Files | Pocket Physics Sketch File |
| .XLL | Microsoft Corporation | Plugin Files | Excel Add-In File |
| .QTM | Apple | Video Files | Apple QuickTime Movie |
| .GBL | Ucamco | Data Files | Gerber Bottom Layer Data File |
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