Audio Sluttering Problem in Windows Xp OS

Recently From 3 months on wards I have found one New Problem in Windows Xp os.. i dont know what is that but I really Sucks,me A lot, Its a Virus or not I don't Know. The Problem is Windows is Booting Very slow and Also Audio Sluttering Problem .. audio is playing like a old cassette player.. it's making Lot of Disturbances .We colud not able to lesten one song clearly...

But I have found... These Problem is Facing Many People .. like me .. But in Vista I don't Have any Problem...I have tried Many antivirus like node32,avg,avast,macfee,pctools virus , malware, spyware, regedit,ccleaner,process checker, but no Results... Same problem .. i could not able to Solve the problem...


Please Help Me if u Found any solution............................