I've just installed Win 7 64bit on my Acer Extensa 4420 notebook. I went to the Acer site and downloaded the VGA ATI 8.635.0.0W7x64W7x86A Installed but it doesn't work, wrong drivers, how do I find the video drivers for this notebook? I'm selling this to a friend next month. should I install the 32bit version of Win7 instead? I have both discs. I had Ubuntu Linux on this for two years and it found the right video drivers automatically, I thought Windows could do as well.