Well...I like to get close enough to the reason why something doesn't work...that I don't wind up replacing the wrong thing or conducting the wrong procedure.
Example: If I have a memory or hard drive problem...clean installing XP may become/be an impossibility, no matter how many times I try.
It's up to you...if you don't want to take the time to investigate. It's not my system and I can't tell you what you should do, only what I would do.
If you do a clean install, you will need to go to the Gigabyte website, look up your motherboard model...and download all drivers (video, audio, USB, NIC, etc.) that apply to that board and XP...and install same shortly after XP is installed. Of course, a clean install will delete everything currently installed on that system, so you need to be sure that's what you want to do before regretting your actions.
There are several Gigabyte S-series boards, so you will have to be more specific when you look for drivers at that site.
FWIW: Clean Install Procedure with Illustrative Screen Captures - http://www.theeldergeek.com/xp_home_install_-_graphic.htm