I had a first flight vista basic OS on a cheap dell inspiron 1500 back in march 07 and had clock problems. It would lose a few minutes per hour...I never got it fixed before I switched to xp because the computer was very slow. On my new MBP, most of us running vista are having major problems with the clock...I think this would be fixed by now but I guess not. Usually loses a minute or two per hour but sometimes jumps like 4 hrs. I have changed the registry to update every day. My searches online revealed nothing but many people have had this problem and everyone giving advice just assumes a bad CMOS battery. What about you other vista users on here?