ITunes 10.6.1 install failed

Question

The system attempted to automatically update iTunes recently. It failed. I was busy at the time so I didn't really pay any attention to it. Fast forward a few days to now. When I launch iTunes, I am told "This copy of iTunes is corrupted or is not installed correctly. Please reinstall iTunes." I tried to do just that. I downloaded the 10.6.1 installer from Apple and attempted to install it. Again, the installation failed. Below are the Console messages. How do I correct this problem? I have already repaired disk permissions, verified the disk, and rebooted. The most notable things I did recently were:
1) Updated Xcode from the App Store app. When the download and update completed, I accidentally hit the update all button in the App Store app again causing Xcode to start downloading. I immediately paused the download. The paused download disappeared from the App Store app's available updates list but it did appear in Launchpad. I tried to delete paused download from Launchpad and it didn't appear to work but somehow, it is now nowhere to be found in Launchpad.
2) Streamed videos from my MacBook to my new Apple TV. Incidentally, the Apple TV malfunctioned (all icons but Computers and Settings were displayed) and I had to reset it to factory defaults. It works again.
3/30/12 11:27:06.200 PM Installer: iTunes  Installation Log
3/30/12 11:27:06.200 PM Installer: Opened from: /Volumes/iTunes 10.6.1/Install iTunes.pkg
3/30/12 11:27:06.453 PM Installer: Performance: Please update this scripting addition to supply a value for ThreadSafe for each event handler: "/Library/ScriptingAdditions/SIMBL.osax"
3/30/12 11:27:08.509 PM Installer: InstallerStatusNotifications plugin loaded
3/30/12 11:27:19.290 PM Installer: ================================================================================
3/30/12 11:27:19.290 PM Installer: User picked Standard Install
3/30/12 11:27:19.290 PM Installer: Choices selected for installation:
3/30/12 11:27:19.290 PM Installer:           Upgrade: "iTunes"
3/30/12 11:27:19.290 PM Installer:           Upgrade: "Apple Mobile Device Support"
3/30/12 11:27:19.290 PM Installer:           Upgrade: "iTunes"
3/30/12 11:27:19.290 PM Installer: ================================================================================
3/30/12 11:27:24.120 PM Installer: Configuring volume "Lion"
3/30/12 11:27:24.133 PM Installer: Free space on "Lion": 170.99 GB (170993594368 bytes).
3/30/12 11:27:24.133 PM Installer: Create temporary directory "/var/folders/63/fs0yw4ld62xdpyp0ysk7jcd00000gn/T//Install.560hqV9Ph"
3/30/12 11:27:24.139 PM Installer: IFPKInstallElement (5 packages)
3/30/12 11:27:24.315 PM authorizationhost: SFBuiltinEntitled: Installer.app is not entitled for system.install.apple-software
3/30/12 11:27:24.342 PM authorizationhost: SFBuiltinEntitled: Installer.app is not entitled for system.install.app-store-software
3/30/12 11:27:24.369 PM authorizationhost: SFBuiltinEntitled: Installer.app is not entitled for system.install.app-store-software
3/30/12 11:27:24.370 PM com.apple.SecurityServer: Failed to authorize right 'system.install.app-store-software' by client '/System/Library/PrivateFrameworks/PackageKit.framework/Versions/A/Resources/installd' [568] for authorization created by '/System/Library/CoreServices/Installer.app' [560]
3/30/12 11:27:24.373 PM installd: PackageKit: ----- Begin install -----
3/30/12 11:27:48.648 PM xpchelper: could not open dyld map file: (null)
3/30/12 11:27:50.142 PM sudo:     root : TTY=unknown ; PWD=/private/tmp/PKInstallSandbox.MNraFl/Scripts/com.apple.pkg.AppleMobileDeviceSupport.yxOS2Q ; USER=root ; COMMAND=/bin/launchctl unload //System/Library/LaunchDaemons/com.apple.usbmuxd.plist
3/30/12 11:27:50.000 PM kernel: Kext com.apple.driver.AppleMobileDevice not found for unload request.
3/30/12 11:27:50.000 PM kernel: Kext com.apple.driver.AppleUSBEthernetHost not found for unload request.
3/30/12 11:27:54.582 PM shove: [source=file] failed _RelinkFile(/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/Cleanup At Startup/PKInstallSandbox-tmp/Root/Applications/iTunes.app/Contents/Resources/Spanish.lproj/CDInfo.nib/keyedobjects.nib, /Applications/iTunes.app/Contents/Resources/Spanish.lproj/CDInfo.nib/keyedobjects.nib): Operation not permitted
3/30/12 11:27:54.585 PM shove: srcPath = /var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/Cleanup At Startup/PKInstallSandbox-tmp/Root/Applications/iTunes.app/Contents/Resources/Spanish.lproj/CDInfo.nib/keyedobjects.nib NSFileOwnerAccountID=0 NSFileHFSTypeCode=0 NSFileSystemFileNumber=7909127 NSFileExtensionHidden=0 NSFileSystemNumber=234881028 NSFileSize=12863 NSFileGroupOwnerAccountID=0 NSFileOwnerAccountName=root NSFileCreationDate=2012-03-21 07:31:07 +0000 NSFilePosixPermissions=420 NSFileHFSCreatorCode=0 NSFileType=NSFileTypeRegular NSFileGroupOwnerAccountName=wheel NSFileReferenceCount=1 NSFileModificationDate=2012-03-21 07:31:07 +0000
3/30/12 11:27:54.586 PM shove: dstPath = /Applications/iTunes.app/Contents/Resources/Spanish.lproj/CDInfo.nib/keyedobjects.nib NSFileOwnerAccountID=0 NSFileHFSTypeCode=0 NSFileSystemFileNumber=6522007 NSFileExtensionHidden=0 NSFileSystemNumber=234881028 NSFileSize=12863 NSFileGroupOwnerAccountID=0 NSFileOwnerAccountName=root NSFileCreationDate=2012-03-07 06:13:35 +0000 NSFilePosixPermissions=420 NSFileHFSCreatorCode=0 NSFileType=NSFileTypeRegular NSFileGroupOwnerAccountName=wheel NSFileReferenceCount=1 NSFileModificationDate=2012-03-07 06:13:35 +0000
3/30/12 11:27:54.587 PM shove: dstParentPath = /Applications/iTunes.app/Contents/Resources/Spanish.lproj/CDInfo.nib NSFileOwnerAccountID=0 NSFileSystemFileNumber=1255061 NSFileExtensionHidden=0 NSFileSystemNumber=234881028 NSFileSize=2270062258 NSFileGroupOwnerAccountID=0 NSFileOwnerAccountName=root NSFileCreationDate=1972-02-24 19:55:33 +0000 NSFilePosixPermissions=493 NSFileAppendOnly=1 NSFileType=NSFileTypeDirectory NSFileGroupOwnerAccountName=wheel NSFileReferenceCount=50889 NSFileModificationDate=1970-01-10 05:55:04 +0000 NSFileImmutable=1 XATTR=com.apple.FinderInfo
3/30/12 11:27:54.587 PM com.apple.installd: Operation not permitted
3/30/12 11:27:55.044 PM installd: PackageKit: Install Failed: Error Domain=PKInstallErrorDomain Code=120 "An unexpected error occurred while moving files to the final destination." UserInfo=0x7fb87b913c20 {NSLocalizedDescription=An unexpected error occurred while moving files to the final destination., arguments=(
    "-f",
    "-s",
    "/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/Cleanup At Startup/PKInstallSandbox-tmp/Root",
), NSUnderlyingError=0x7fb87b914c80 "The operation couldn’t be completed. Operation not permitted"} {
    NSLocalizedDescription = "An unexpected error occurred while moving files to the final destination.";
    NSUnderlyingError = "Error Domain=NSPOSIXErrorDomain Code=1 \"The operation couldn\U2019t be completed. Operation not permitted\"";
    arguments =     (
        "-f",
        "-s",
        "/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/Cleanup At Startup/PKInstallSandbox-tmp/Root",
3/30/12 11:27:55.415 PM Installer: Install failed: The Installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance.
3/30/12 11:27:55.571 PM Installer: IFDInstallController AD3348B0 state = 7
3/30/12 11:27:55.571 PM Installer: Displaying 'Install Failed' UI.
3/30/12 11:27:55.573 PM Installer: 'Install Failed' UI displayed message:'The Installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance.'.
3/30/12 11:27:55.588 PM Installer: The Installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance.

Answer 1

This problem is resolved. I deleted the old iTunes (with write permissions turned on for my account) and reinstalled successfully. Removing the deleted iTunes from Trash was troublesome even with root but after playing around with permissions and flags, I was able to remove it.