Amazon.com: HP EliteBook 840 G4 14" HD Laptop, Core i5-7300U 2.6GHz, 16GB RAM, 512GB Solid State Drive, Windows 10 Pro 64Bit, Webcam (Renewed) : Electronics
HP EliteBook 840 G1 Specification | Manualzz
Elitebook 840 G1 Wireless Drivers... - HP Hardware
HP EliteBook 840 Drivers for Windows 10, 8.1, 8, 7, Vista, XP | Driver Talent