| File Extension: | W31 |
| File Type Description: | Windows 3.1 Startup Data |
| File Type Developer: | Microsoft Corporation |
| Primary Associated Software: | Microsoft Windows 3.x |
| Primary Software Developer: | Microsoft Corporation |
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Release of the Microsoft Windows 3.x software program prompted the development of the Windows 3.1 Startup Data file type by Microsoft Corporation. Internal website statistics show that W31 files are most popular with users in United States and those running the Windows 10 operating system. Generally, we have found that most of these people are Google Chrome users.
 | Microsoft Windows 3.x by Microsoft Corporation |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .NDF | Microsoft Corporation | Database Files | SQL Server Secondary Database File |
| .323 | Microsoft Corporation | Data Files | Microsoft NetMeeting File |
| .IN_ | Microsoft Corporation | Settings Files | Microcoft Setup Information Data |
| .CV4 | Microsoft Corporation | Developer Files | Microsoft CodeView Graphics Data |
| .XNB | Microsoft Corporation | Game Files | XNA Game Studio Binary Package |
| .WMF | Microsoft Corporation | Vector Image Files | Windows Metafile |
| .MDMP | Microsoft Corporation | System Files | Windows Minidump |
| .T2 | RM Education | Data Files | Textease 2000 File |
| .CDX | Microsoft Corporation | Data Files | Compound Index File |
| .EXC | Lionhead Studios | Game Files | Black & White Zone File |
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