I upgraded to XP and things went fairly good. Did some adjustments etc. Then I noticed that my sound comes through my speakers with a kind of muffled bass distortion. When I went to do the advanced bass/treble adjustment it could nto be activated. HELP told me that with the current sound driver I could not access the bass/treble setting. Does this mean I need some kind of upgrade on the sond driver? The speakers are very good Altecs so that is not the problem. Even the small higher range speakers seem to have a heavy bass distortion. Any ideas to help? Dennis