Problems with Nvidia gpu post BIOS system BIOS update.

Hello all, this is my first time posting here so please forgive any mistakes/oversights. I've just updated my Samsung laptop's system BIOS via their software update program, and my Nvidia GPU (GT 650m DDR3) no longer seems to work. The Nvidia control panel is still there, and it still gives me the option to select which programs use the GPU, but there is no GPU actitivity showing up. Also,I've tried playing Skyrim (which auto-detects the PC's graphics cards) , and the game no longer seems to detect the Nvidia GPU (just the Intel integrated graphics).

My laptop model is NP550PC7, with 6 gig of ram, and an i7 quad core CPU, and the OS is Window 7 Home Premium 64bit.

I've tried looking in the BIOS but I can't seem to find anything related to the GPU or display options. Any help or avice is much appreciated.

Thanks for your reply. In fact, I've just this minute corrected the problem - it was as simple as going to Device Manager in the control panel, and disabling and then re-enabling the Nvidia GPU. I still don't know why updating the BIOS caused the issue in the first place.