USB No Chime but devices are seen in the device manager

Hello..

I have vista home prem... I use my laptop to do Astrophotography.. When I
connected the scope and camera's I did not get a chime.. they would not work
either... I could see that they were in the device manager when they were
plugged in but they would not work.. scope would not connect either...

I did a system restore and everything works fine now... this appears to be
perhaps a vista system update issue?

Thank for any input...