Click here to go back to the HP Compaq Laptop Models List
After installing windows 8 or 10 on a HP 820 G1 laptop there are 7 missing drivers. For windows 10 most can be updated in the operating system. The 7 missing drivers are BCM20702A0, PCI device, PCI simple communications controller, Unknown device x2, SMbus controller, Unknown device x2. The correct drivers in order are Broadcom bluetooth 4.0 adapter, Realtek PCIE card reader, Intel engine management interface x3 win 10, Intel engine management interface x3 win 8,HP mobile data protection sensor, Intel Smart Connect device. Click each to download. For windows 11 do the same for the 2 missing drivers.

Don't forget the correct power supply is 18.5V 3.5A 7.4mm x 5mm