driver software for graphic card geforce 8600gt

Here >> http://www.geforce.com/drivers

You can select Automatic Driver Updates and it will automatically detects your hardware and download the correct driver for it

or

you can go manual driver search ... here the sample search and the result.. http://www.geforce.com/drivers/results/89879

Version 341.81
Release Date Mon Aug 24, 2015
Operating System Windows 7 64-bit
Windows 8.1 64-bit
Windows 8 64-bit
Windows Vista 64-bit
Language English (US)
File Size 269.73 MB

GeForce 400 Series
GeForce 405
GeForce 300 Series
GeForce GT 340, GeForce GT 330, GeForce GT 320, GeForce 315, GeForce 310
GeForce 200 Series
GeForce GTX 295, GeForce GTX 285, GeForce GTX 280, GeForce GTX 275, GeForce GTX 260, GeForce GTS 250, GeForce GTS 240, GeForce GT 230, GeForce GT 240, GeForce GT 220, GeForce G210, GeForce 210, GeForce 205
GeForce 100 Series
GeForce GT 140, GeForce GT 130, GeForce GT 120, GeForce G100
GeForce 9 Series
GeForce 9800 GX2, GeForce 9800 GTX/GTX , GeForce 9800 GT, GeForce 9600 GT, GeForce 9600 GSO, GeForce 9600 GSO 512, GeForce 9600 GS, GeForce 9500 GT, GeForce 9500 GS, GeForce 9400 GT, GeForce 9400, GeForce 9300 GS, GeForce 9300 GE, GeForce 9300 SE, GeForce 9300, GeForce 9200, GeForce 9100
GeForce 8 Series
GeForce 8800 Ultra, GeForce 8800 GTX, GeForce 8800 GTS 512, GeForce 8800 GTS, GeForce 8800 GT, GeForce 8800 GS, GeForce 8600 GTS,

GeForce 8600 GT

, GeForce 8600 GS, GeForce 8500 GT, GeForce 8400 GS, GeForce 8400 SE, GeForce 8400, GeForce 8300 GS, GeForce 8300, GeForce 8200, GeForce 8200 /nForce 730a, GeForce 8100 /nForce 720a
ION (Desktops)
ION
ION LE (Desktops)
ION LE