When I run System Information Tool utility the following displays:
Motherboard chipset SiS645
AGP Controller: AGP Version 2.00, AGP Status Enabled, and so on.


When I visit manufacture site for driver download it displays:

Step 1: <Select>
Chipset Software, IGP Graphics Drivers, GPU Graphics Drivers, Audio Driver, Network Driver, Other Utilities & Tool

Step 2: <Select>
SATA & RAID, AGP (GART) Driver, IDE Driver, Other AGP & IDE Drivers

Step 3: <Select>
Windows XP 64-bit Edition, Windows XP, Windows 2000, Windows ME, Windows 98, Windows 98

I select “Chipset Software” at step 1 and Windows XP at step 3 (as I am using Windows XP Home Edition.

Could anyone please help me to select the category in Step 2. Thank you.

You could try THIS direct link and see if that works for you