Yes I always shutdown as a "Start - Shutdown". As for Vista updates, I never installed any Vista update again within a parallels vm, only in a native boot. If there are any Windows updates available, I'll shut down in the parallels vm and reboot the Mac and Vista from BootCamp before installing any updates. After my bad experience of installing the SP1 update in the parallels, I won't dare do it again. Anyhow, it's working now but I always travel with the Vista disk in case repairs are needed.