arogier writes "After numerous delays and an actual release reversal, the official release date for Vista service pack one has been set for Tuesday, March 18th on Windows Update and Microsoft Downloads. It will be released as an automatic update on April 18th. 'It's unclear so far how a February snafu will affect SP1's roll-out. Last month, after Microsoft pushed a pair of prerequisite patches to users, some reported that their machines refused to finish installing one of the fixes, then went into an endless series of reboots. Several days later, Microsoft pulled the update from automatic delivery, said it was working on a solution and promised it would "make the update available again shortly after we address the issue."' It would be a good time for those planning to adopt early to perform requisite backups and locate their restore media."