HP may have archived Windows 7 drivers for the G2. Try:
Here’s an informative guide to finding, installing, and troubleshooting . hp elitedesk 800 g2 drivers windows 7 64 bit hot
If your HP EliteDesk 800 G2 is running hot under Windows 7, it is often due to missing power management drivers, forcing the CPU to run at maximum speed constantly, or an outdated Graphics driver causing heavy CPU usage. 1. Install Intel Management Engine Components HP may have archived Windows 7 drivers for the G2
Download files from the HP EliteDesk 800 35W G2 Mini Portal . hp elitedesk 800 g2 drivers windows 7 64 bit hot