hello,i am having a problem in my sound system of lenovo laptop.sometimes it is having a typical sound while playing a song.means the tempo of the song is getting slower and a sound is produced while playing that song.and after restarting it gets ok.but again after few days the sound system is getting the same sound while playing any song.i have checked the speaker configuration.it is fine.then why it is going on?and also while playing the video the tempo of the movie and sound is getting slower than the original.again the synchronization between the keyboard typing and monitor displaying is getting disturbed.whatever i am typing is getting displaying on the monitor after a while.and after restarting the entire problem is getting solved.and again after sometime the same thing is happening.i cant understand what is the problem going on.i will be really grateful if you help me out.thanking you