Nvidia software update PC won't boot!

Hi,

Firstly apologies if this is in the wrong section, there seems to be so many, I wasn't sure which one to choose.

I've updated my Nvidia graphics card, since then my PC won't boot. I've tried to get into safe mode and remove the update, but I can't get into safe mode.

Everytime I boot and press F8, I end up in 'System Setup' and not 'Advanced Boot options', I've tried hundreds of times but it's always the same.

If I let the system boot without pressing anything, I get a black screen with a cursor top left and E7 bottom right, nothing else.

I'm an engineer but am not particularly PC savvy so I don't know any details of my graphics card etc.

Nothing else has changed, I simply updated the software from Nvidia as requested by the PC.

My keyboard is the cable free USB type, and I have to select a function key to select F8 as the key is a shared one (F2 & F8)

Thanks in Advance

Andy