| 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 United States. 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 |
|---|---|---|---|
| .ME | Unknown Developer | Uncommon Files | Temporary Delete Me File |
| .LGT | Microsoft Corporation | Settings Files | Let's Go! Theme File |
| .ULZ | Microsoft Corporation | Settings Files | Windows Updates Downloader Update List File |
| .MFCRIBBON-MS | Microsoft Corporation | Developer Files | MFC Ribbon Definition XML File |
| .PIP | Microsoft Corporation | Settings Files | Office Personalized Settings File |
| .FFF | Hasselblad | Camera Raw Files | Hasselblad RAW Image |
| .EXT | Symantec Corporation | Plugin Files | Norton Commander Extension |
| .GPR | Molecular Devices | Data Files | GenePix Results File |
| .DTD | Syncro Soft | Developer Files | Document Type Definition File |
| .FL | Microsoft Corporation | Game Files | Freelancer Saved Game File |
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