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 |