i am currently using an et2400 xvt all-in-on pc. its **** though.

my problem is when i try and update the 460m graphics card from the nvidia website i cant install it. i have input the correct graphics card and i have the right update but when i run it it comes up with an error. it says:

NVIDIA installer cannot continue, the graphics driver could not find compatible graphics hardware. how do i update it now?

it is a windows 7 64 bit operating system and has a Intel® HM55 Chipset. this is all i can tell you for now. let me know if there is anything else

my second problem is whenever i start up my computer and open applications or play a game for a long period of time i get a strange like down the exact centre of my screen and the graphics or the screen to the right of that like is coloured a little bit diffidently. please let me know if you know anything about this or how to fix it, all i do know is that adjusting the refresh rate can have some effect on it and at times can fix the problem

thank you