Every time I lock my Vista Premium PC via the system lock ("Locik this computer" from the Start menu), I lose my sound in SL and it never comes back until I log out and log back in. This is a recent problem - I've been in SL for over 3 years and don't recall this ever happening before. Toggling sound off and on does nothing. I'm not aware of any changes I've made to the PC to cause this. I've tried various options with respect to muting the viewer while minimized, muting sound before locking, etc., and none of these solve the basic problem. This happens with Phoenix and with the SL viewers, so is universal. This is the most annoying problem - if I'm at a live show in SL and have to pee, I either can't lock my system or I have to log off of SL first, lock, then log back in when I'm back. Truly miserable.