| File Extension: | H1Q |
| File Type Description: | Microsoft Help Merged Query Index |
| File Type Developer: | Microsoft Corporation |
| Primary Associated Software: | Windows XP |
| Primary Software Developer: | Microsoft Corporation |
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Primarily, a H1Q file extension is a type of Microsoft Help Merged Query Index file developed for the Windows XP software program by Microsoft Corporation. According to our internal data, Microsoft Help Merged Query Index files are most popular with users in United States, with a majority of them running Windows 10. Generally, we have found that most of these people are Google Chrome users.
 | Windows XP by Microsoft Corporation |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .PACKAGE | Electronic Arts | Game Files | Electronic Arts Game Package File |
| .DP | Stefan Hagel | Text Files | Text Document |
| .ACL | Microsoft Corporation | Uncommon Files | AutoCorrect List File |
| .LOCKED | Unknown Developer | Encoded Files | Ransomware Encrypted File |
| ._SLN140 | Microsoft Corporation | Data Files | Microsoft Visual Studio Data |
| .CDA | Microsoft Corporation | Audio Files | CD Audio Track Shortcut |
| .RDG | Microsoft Corporation | Settings Files | Microsoft Remote Desktop Connection Manager Configuration |
| .DCX | ZSoft Corporation | Raster Image Files | Zsoft Multi-Page Paintbrush File |
| .CIL | Symantec Corporation | Data Files | Norton CleanSweep Installation Log File |
| .OPUS | Open Source | Audio Files | Opus Audio File |
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