| File Extension: | DUP |
| File Type Description: | Microsoft Windows DUA Polling Reconfiguration Data |
| File Type Developer: | Microsoft Corporation |
| Primary Associated Software: | Microsoft Windows |
| Primary Software Developer: | Microsoft Corporation |
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The DUP file extension is a Microsoft Windows DUA Polling Reconfiguration Data file developed originally by Microsoft Corporation for Microsoft Windows. Website visitor analysis indicates that DUP files are commonly found on Windows 10 user machines, and are most popular in China. A vast majority of these users are opting to use Google Chrome as their preferred internet 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 |
|---|---|---|---|
| .ADD | Microsoft Corporation | Uncommon Files | Dynamics AX Developer Documentation File |
| .VXML | Voxeo Corporation | Data Files | VoiceXML File |
| .ALT | Microsoft Corporation | Uncommon Files | Dynamics AX Temporary File |
| .P7S | Unknown Developer | Encoded Files | PKCS #7 Signature File Format |
| .BMP | Various Developers | Raster Image Files | Bitmap Image File |
| .PUZ | Literate Software | Game Files | Across Lite Crossword Puzzle |
| .386 | Microsoft Corporation | System Files | Windows Virtual Device Driver |
| .XBAP | Microsoft Corporation | Executable Files | XAML Browser Application File |
| .DL | Microsoft Corporation | Game Files | Zoo Tycoon 2 Data File |
| .FLM | Image-Line | Audio Files | FL Studio Mobile Song File |
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