have you got an onboard sound card as well? - if so turn it off in the bios.
If not install the latest drivers for your sound card as windows maybe installing incorrect drivers on boot up.
Have a look in "systems information" in sub-category "problem devices" and see what is listed.
Basically it sounds like one of your drivers or hardware is corrupt which has upset your system and causing boot problems - its a matter of finding which driver or hardware that is causing the problems - it may not necessarily be your audio drivers but something like your mother board drivers
Starting to have trouble booting up a couple of days ago. Computer is 2 1/2 years old. AMD 2100, 512mb ram, Geforce TI4400 video, Creative Audigy sound card, 420watt power supply, running Win XP (no service packs installed)
Will hang up booting, when I press reset, will hang up at various stages of boot process. When I try to boot into safe mode, it will not go there, simply reboots. Have to do this numerous times before it will finally boot into windows. After it does boot, everything is peachy keen and stable.
When I finally got it to the desktop, I checked device manager & found there was a problem with my Audigy sound card, no driver installed, but I have sound and it works fine. Tried to uninstall it in Add/remove programs, but it still lists it there. Then tried to uninstall it in device manager and reboot, then reinstall the driver, then reboot again, but it still insists that no driver is installed. I have tried both the original driver that came with the computer and the latest driver from Creative (I had the latest one installed for quite a while before this problem started.
Also, one of the times I shut down the computer, it restarted itself after turning it off.
I checked all the fans & they're all turning & the power supply is running cool (I even left the side off the case to see if that would help).
Any help I can get with this problem will be greatly appreciated.