>A friend of mine has installation problems when she tries to install SP3 for SQL Server 2005 64x.
>OS: Windows Server 2003 R2 64
>
>Here the end of the log file:
>

>...
>07/03/2012 11:10:14.041 Installing product: Redist9
>07/03/2012 11:10:14.041 Installing instance: Setup Support Files
>07/03/2012 11:10:14.041 Installing target: DAPPDB12
>07/03/2012 11:10:14.041 Installing file: SqlSupport.msi
>07/03/2012 11:10:14.181 Copy Engine: Creating MSI install log file at: C:\Program Files\Microsoft SQL Server\90\Setup Bootstrap\LOG\Hotfix\Redist9_Hotfix_KB955706_SqlSupport.msi.log
>07/03/2012 11:10:14.181 Registry: Opened registry key "Software\Policies\Microsoft\Windows\Installer"
>07/03/2012 11:10:14.181 Registry: Cannot read registry key value "Debug", error 2
>07/03/2012 11:10:44.449 Registry: Opened registry key "Software\Policies\Microsoft\Windows\Installer"
>07/03/2012 11:10:44.449 Registry: Cannot read registry key value "Debug", error 0
>07/03/2012 11:10:44.449 Copy Engine: Installed file: C:\Program Files\Microsoft SQL Server\90\Setup Bootstrap\Cache\SQLSupport\x64\1033\SqlSupport.msi
>07/03/2012 11:10:44.464 Installed target: DAPPDB12
>07/03/2012 11:10:44.589 Installed instance: Setup Support Files
>07/03/2012 11:10:44.589 Installed product: Redist9
>07/03/2012 11:10:44.589 Installing product: SQL9
>07/03/2012 11:10:44.589 Installing instance: DSQLC02I18
>07/03/2012 11:10:44.605 Enumerating passive cluster nodes
>07/03/2012 11:10:44.621 Patching available passive node: DAPPDB10
>07/03/2012 11:10:44.621 Waiting for first completed passive node
>07/03/2012 11:10:44.621 Patching passive node: DAPPDB10
>07/03/2012 11:10:44.746 Task Scheduler: Created remote folder for product instance target \\DAPPDB10
>07/03/2012 11:11:30.280 Task Scheduler: Transferred payload to remote product instance target \\DAPPDB10
>07/03/2012 11:11:30.280 Task Scheduler: Transferred payload to remote product instance target \\DAPPDB10
>07/03/2012 11:11:30.311 Task Scheduler: Created new scheduled task for product instance target \\DAPPDB10
>07/03/2012 11:11:30.311 Task Scheduler: SaveTaskToDisk(): Got task interface
>07/03/2012 11:11:30.577 Task Scheduler: Saved new scheduled task for product instance target \\DAPPDB10
>07/03/2012 11:11:30.577 Task Scheduler: Created scheduled task for product instance target \\DAPPDB10
>07/03/2012 11:11:30.592 Task Scheduler: Started scheduled task for product instance target \\DAPPDB10
>07/03/2012 11:11:30.592 Task Scheduler: Started scheduled task for product instance target \\DAPPDB10
>07/03/2012 11:34:03.647 Task Scheduler: Scheduled task for product instance target has completed
>07/03/2012 11:34:03.647 Task Scheduler: Waiting for exit code from scheduled task for product instance target \\DAPPDB10
>07/03/2012 11:34:08.647 Task Scheduler: Received exit code 3010 from scheduled task for product instance target \\DAPPDB10
>07/03/2012 11:34:08.647 Task Scheduler: Result code for scheduled task for product instance target has been received
>07/03/2012 11:34:08.647 Task Scheduler: Removed scheduled task for product instance target \\DAPPDB10
>07/03/2012 11:34:09.007 Task Scheduler: Removed remote folder for product instance target \\DAPPDB10
>07/03/2012 11:34:09.007 Remote process completed for product instance target
>07/03/2012 11:34:09.007 Exit code for passive node: DAPPDB10 = 3010
>07/03/2012 11:34:09.663 First successful passive node has been completed
>07/03/2012 11:34:09.663 Installing target: DAPPDB12
>07/03/2012 11:34:15.601 Installing file: sqlrun_sql.msp
>07/03/2012 11:34:15.601 Copy Engine: Creating MSP install log file at: C:\Program Files\Microsoft SQL Server\90\Setup Bootstrap\LOG\Hotfix\SQL9_Hotfix_KB955706_sqlrun_sql.msp.log
>07/03/2012 11:34:15.601 Registry: Opened registry key "Software\Policies\Microsoft\Windows\Installer"
>07/03/2012 11:34:15.601 Registry: Cannot read registry key value "Debug", error 0
>

>And the installation just wait there for almost 4 hours.
>No errors, no messages, nothing.
>
>Don't ask WHY she install SP3 :o)
>That is a customers wish.
>
>Forgot that this is cluster.
>
>TIA

I suggest her to post this question in the Setup and Upgrade forum at MSDN. Many MSFT people answer there, they should be able to help her.