There should have been software with the motherboard. If not, you'll need to find the correct update that goes with Windows XP.
Hope this helps.
Just built my first computer. Here's the specs: Asus K8V with Athlon 64 3000+, Seagate Barracuda 120GB SATA HDD, Mad Dog Dominator DVD/CD burner, Ultra 400Mhz 512MB memory (1 stick). No problem on first firing up and entering Setup. All Devices were detected. Fun began when I started loading WinXP. Received "Stop Error" message when I inserted Win98 CD for usual check of my qualifications. Message decoded as problem with RAM. Switched stick to another socket and also reset CMOS. Now I can't enter Setup or do anything else. At Power on or reset, it does the IDE scanning thing and still detects the HDDD, DVD/CD and floppy and then tells me "The BIOS is not installed". "Beep". Then a message "CMOS Checksum Bad" "F1 to run Setup or F2 to load default values and continue". Pressing either one does nothing. Any thoughts? Thanks