When you plug in a new device, Windows doesn't search your whole drive. It queries the PnP (Plug and Play) manager, which cross-references the device’s hardware IDs against the indexed database of the DriverStore. If a match is found, Windows stages the driver—copying the relevant .sys file to System32\drivers and setting registry keys.
Open setupapi.dev.log in the INF folder (it can be hundreds of megabytes). It is a forensic ledger of every driver installation, failure, and rollback. You’ll see lines like: where are windows 10 drivers stored
The answer is not a single folder. It’s a layered archive, a hall of mirrors, and a graveyard—all hidden from the File Explorer user who never checks "Show hidden items." This is where the magic executes . Open this folder (yes, you need admin rights just to peek), and you’ll see a sea of .sys files. These are the actual running drivers—kernel-mode or user-mode executables that load at boot. When you plug in a new device, Windows