hi.. i have HP Pavilion DV4-1145 that was bought not a year ago but ever since, i keep having this garbled start-up sound. when that vista logo appears, it sounds like a scratched cd. i brought it to the HP service center and they restored it to factory settings. the sound was good for a few hours but after all the updates were installed, the garbling sound came back. i don't seem to have problems with my music or videos or my messengers but the garbling start-up sound really irks me. removed the IDT high definition audio codec, reinstalled it, updated it, rolled it back, etc, nothing really works. called the HP support, emailed them, nothing solved my problem. i tried booting it up in Safe Mode to know what start-up program has a problem but the sound in Safe Mode is muted. i don't know what to do anymore, please help.. 
