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This start type is used by the file system recognizer. Indicates a driver started during OS initialization. Legacy file system filters must use this start type see file system filter load order groups for more information. File system filter drivers commonly use this start type or SERVICE_DEMAND_START. Indicates a driver started by the operating system (OS) loader. There are five possible start types: Start Type Driver start typesĪ kernel-mode driver's start type specifies whether the driver is to be loaded during or after system startup.
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Note that a "minifilter" filter driver can be loaded at any time.īefore exploring when and how file system filter drivers are loaded during the system boot sequence, it is necessary to understand driver start types and load order groups. The concept of load order groups is required by file system filter drivers for interoperability with legacy file system filter drivers. The load order groups for file system filter drivers that are loaded at system startup.
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