Are you using DirectX/WMD/ASIO/asio4all drivers? Have you tried adjusting the latencies?
You may have a device conflict... Though I think those are extremely rare on XP.
If it was me I'd do a fresh install of the OS, update it then reinstall my apps... But I have all my save data on one hard disk and all my system data on another so I can start fresh at a moment's notice. I'd imagine the whole process would take a while for you.
problems with m-audio drivers?!?!? *gasp*
if i were you I wouldn't reinstall the os...isn't there a way to downgrade to sp2?
you made a restore point and backed up right?
a lot of people have been switching to sp3 lately and i can't figure out why.
xp is never going to be a secure os and afaik they didn't implement anything NEW in sp3. (like usb 3.0 support)
lots of people on here have had problems with m-audio drivers + sp3 (me included).
i had to uninstall the newest drivers and find an old install of the m-audio drivers. all went well after that.
What software are you using? When does the glitching happen? What do you have your latency set to?
Oh and by the way- I have put SP3 on over 1500 computers in the last month and had no problems.
Thanks for your help, I seem to have helped the glitching problem by reinstalling the internal soundcard after making SP3 think it was SP2 in the registry and then changing it back afterwards.
Latency still seems high though!