I have a G72-261US Notebook that I've been using for many years now, and I recently made the upgrade to Windows 10 from Windows 7 on it. This made the Synaptics touchpad act all funky, so I researched the internet and found a driver that would work properly with it. It's been running absolutely fine ever since, until Windows 10 decided it wanted to automatically update the driver a few days later, which made it funky again.
I tried uninstalling the driver, just like I did last time, in order to reinstall the driver I had found that works fine, but after uninstalling and restarting, before I could install the working one, the touchpad is completely unresponsive, and none of the keyboard keys work. Not even the num lock or wifi LEDs will toggle when I press them. The computer is stuck on the login screen with the time displayed on it, just before you make it slide away and type in your password to login to Windows 10.
The one button that works is the power button, and I've tried restarting multiple times now with no luck. It ALWAYS gets to the Windows 10 login screen and just doesn't care what buttons I press. I can plug in a USB mouse, and that works to let me click away the slide screen to where I'm supposed to enter my password, but I can't enter my password since the keyboard isn't working... I even tried plugging in a USB keyboard, but it's the same problem as the keyboard built into the laptop. None of the keys work, not even the LED toggles for caps/num/scroll lock.
What can I do? The keyboard only works in the BIOS, but none of the options there seem to be helpful to me. The system recovery option just makes it boot to Windows the same way it does normally, but that's probably because it doesn't have a system recovery partition anymore. It also has no restore points.