Canot instal driver - Gigabyte GV-N55128D GeForce® FX5500, (128 MB) AGP Graphic Card

You can get the most recent driver on the Nvidia website.
Just choose the correct information from the drop down menus.

Product Type: GeForce ION Quadro NVS 3D Vision nForce Tesla Legacy Product Series: GeForce 500 Series GeForce 400 Series GeForce 400M Series (Notebooks) GeForce 300 Series GeForce 300M Series (Notebooks) GeForce 200 Series GeForce 200M Series (Notebooks) GeForce 100 Series GeForce 100M Series (Notebooks) GeForce 9 Series GeForce 9M Series (Notebooks) GeForce 8 Series GeForce 8M Series (Notebooks) GeForce 7 Series GeForce Go 7 Series (Notebooks) GeForce 6 Series GeForce 5 FX Series GeForce 4 MX Series Product: GeForce FX 5100 GeForce FX 5200 GeForce FX 5200 Ultra GeForce FX 5200LE GeForce FX 5500 GeForce FX 5600 GeForce FX 5600 Ultra GeForce FX 5600XT GeForce FX 5700 GeForce FX 5700 Ultra GeForce FX 5700LE GeForce FX 5700VE GeForce FX 5800 GeForce FX 5800 Ultra GeForce FX 5900 GeForce FX 5900 Ultra GeForce FX 5900XT GeForce FX 5900ZT GeForce FX 5950 Ultra GeForce PCX 5300 GeForce PCX 5750 GeForce PCX 5900 Download Type: Driver Software HDMI Audio Driver Download Type: Quadro Graphics Driver Quadro Performance Driver Quadro Partner Certified Driver AutoCAD Performance Driver 3ds Max Performance Driver Mosaic Utility Download Type: Graphics Drivers Chipset Drivers HDMI Audio Drivers Operating System: Windows Vista 32-bit Windows Vista 64-bit Windows XP Windows XP 64-bit Windows Server 2003 x64 Windows 2000 Windows ME Windows 98 Windows NT4 Windows 95 Linux 32-bit Linux 64-bit Solaris x86/x64 FreeBSD x86 Language:
Product Type: GeForce
Product Series: GeForce 5 FX Series
Product: GeForce FX 5500
Operating System: The operating system of the PC using the FX 5500 card.
Language: English (US)

Then click Search.
This will take you to the download section where you can download and install the drivers