I have a Fujitsu LH772 laptop, which has an Intel i5 3230m CPU @2.6GHZ and a nVidia 640M LE GPU. I was trying to disable the Intel gpu in the device manager, and when I clicked on the disable button, everything on my laptop screen disappeared except my wallpaper. I forced shutdown and restarted my laptop. The Fujitsu logo appeared, but after that a blue screen appeared. I cannot do anything except moving the cursor. The bios still works, but there isn't an option for me to enable/disable the iGPU. I tried to install Windows 7 on the other partition to use its device manager to re-enable the iGPU, but it wouldn't boot the installation disk, showing "boot error" every time. I can't enter recovery mode, because the startup times are too fast. I tried plugging an HDMI cable into the laptop to connect to my TV, but the TV just shows "NO SIGNAL". The only option I haven't tried is connecting a VGA cable, as I remember that the nVidia GPU is responsible for VGA outputs. I don't have a VGA cable at the moment, so I need other solutions. I have tried almost everything possible, but it still shows the blue screen with only a cursor. I just bought this laptop last month and I don't want to trash it.