We have spend weeks trying to fix this, trying different adaptor drivers from both Windows and from HP, but the issue always returns. Sometimes a hard reboot will fix the speed for a couple more days, sometimes we have to Uninstall the driver and let Windows reinstall it, then again it will work for a couple more days before going again. The issue with all the laptops is, the Wifi will work great for a couple of days, then the Download speed will drop to something like 0.3 - 0.9 Mbps, from in some cases 50+ Mbps. Windows Updates are ran, latest BIOS installed and all the latest HP drivers installed using HP Support Assistant. The laptops are built with a standard Windows media creation USB, then a decrap script ( ) is run in audit mode. They are used on different hot spots (business/home/public) so it isn't an issue with a particular access point. All 10 of them are experiencing issues with WiFi download speeds making them unusable at times. We have recently purchased a mix of 10 HP Probook 430 and 450 G5 laptops.

Pavilion laptop hp wifi driver