How to get USB 2.0 onto Windows XP without upgrading to SP2.
After MANY hours trying to find a good driver that would enable my onboard USB 2.0 ports at full 2.0 speed, I believe I've finally found something solid. No screwing with SP2 required. The following just worked for me:
I got this ZIP file:
I got it from this page:
I'm fairly certain that I don't even have that board. I have a generic P4 motherboard with onboard USB 2.0 (no additional USB 2.0 PCI card).
I went into the Device Manager, chose "Update Driver" on the USB Controller that had a question mark by it, and browsed to the INF file included in the ZIP file. I had previously installed the Q312370_WXP_SP1_x86_ENU.exe file included as well, but I'm not sure if that made any difference. Once the process finished, it installed a new entry for "USB 2.0 Root Hub" and "Intel PCI to USB Enhanced Host Controller". It immediately recognized my USB 2.0 External DVD-writer drive and I successfully tested it at full burn speed.
I know this isn't a great step by step tutorial for beginners, and I don't know what motherboards it works for. I do know that it worked for my computer, on Windows XP Pro without any service packs installed.
By the way, I created a system restore point before trying this and I suggest you do the same for safety.