Original sentence: Clock management Vista expects the real-time clock to run on local time and will alter that clock to and from daylight saving time.In multi-boot environments or virtual machines this is undesirable as the other operation systems can not know when another operation system has adjusted the real-time clock and may as a result display an incorrect time
Edited sentence: Poor clock management Like all Windows operating systems, Vista expects the real-time clock to run on local time.There is still not even an option to change this behaviour to run the real-time clock on Coordinated Universal Time (although there is a registry entry "RealTimeIsUniversal=1"), which is desirable e.to avoid problems with multi-boot environments or virtual machines and daylight saving time, because Vista changes the real-time clock when switching to or from daylight saving time, but other operating systems cannot know this