vista beta 2 won t logon

Vista Beta 2 Won't Logon

After what seems to be a successful upgrade from XP Pro to Vista Beta 2 when logging on the screen shows building desktop then immediately closes desktop and shuts down no matter which user acct. is used. Please help!!!!

After what seems to be a successful upgrade from XP Pro to Vista Beta 2 when logging on the screen shows building desktop then immediately closes desktop and shuts down no matter which user acct. is used. Please help!!!!

Windows Vista

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