USB device discovery and driver loading

graph TD
    A[USB Device Plugged In] --> B[Power Supplied]
    B --> C[Plug and Play Manager Detects USB Device]
    C --> D[USB Stack Initialized]
    D --> E[Device Enumeration]
    E --> F{Driver Found in Driver Store?}
    F -->|Yes| G[Load Driver from Driver Store]
    F -->|No| H[Search Windows Update for Driver]
    H --> I[Download and Install Driver]
    G --> J{Is Device a Storage Device?}
    J -->|Yes| K[Mount Manager Assigns Drive Letter]
    J -->|No| L[Device Ready for Use]
    K --> L
    L --> M[File Explorer Displays Device]

Component/Service	Role	File/Service Name
USB Device Plugged In	User connects the USB device to the computer.	N/A
Power Supplied	Laptop provides power to the USB device for initialization.	N/A
Plug and Play (PnP) Manager	Detects new hardware and initiates the process to recognize the USB.	`umpnpmgr.dll`, `pnpmgr.sys`
USB Stack	Manages communication between the OS and USB device drivers.	`usbhub.sys`, `usbstor.sys`
Driver Store	Stores pre-installed drivers for various hardware devices.	N/A
Windows Update	Searches online for drivers if not found locally.	`wuaueng.dll`
Mount Manager	Mounts storage devices, assigning a drive letter.	`mountmgr.sys`
Device Manager	Provides an interface for viewing and managing connected devices.	`devmgmt.msc`
File Explorer	Allows the user to interact with the device (e.g., browsing files).	`explorer.exe`