Osx 10.6.8 slow shutdown

Have been working on my daughter's Macbook Pro mid 2010 OSX 10.6.8 system prior to upgrading to Mountain Lion.  Shutdown is very slow.  I get the spinning wheel for almost a minute before it shuts down.  What might be causing that?  I would like to resolve this before doing the upgrade to Mountain Lion.  thank you

Check your Airport icon and see if Airport is taking time every 5 seconds to look for networks even though it has the network you told it to connect to firmly in hand.
If so, this might be what is slowing things down. I think it might be for me.
How to fix it??? Haven't a clue....yet.

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    Hi,
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    1. This is a comment on what you should and should not do to protect yourself from malicious software ("malware") that circulates on the Internet. It does not apply to software, such as keystroke loggers, that may be installed deliberately by an intruder who has hands-on access to the victim's computer. That threat is in a different category, and there's no easy way to defend against it. If you have reason to suspect that you're the target of such an attack, you need expert help.
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    OS X now implements three layers of built-in protection specifically against malware, not counting runtime protections such as execute disable, sandboxing, system library randomization, and address space layout randomization that may also guard against other kinds of exploits.
    2. All versions of OS X since 10.6.7 have been able to detect known Mac malware in downloaded files, and to block insecure web plugins. This feature is transparent to the user, but internally Apple calls it "XProtect." The malware recognition database is automatically checked for updates once a day; however, you shouldn't rely on it, because the attackers are always at least a day ahead of the defenders.
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    It only applies to software downloaded from the network. Software installed from a CD or other media is not checked.
    As new versions of OS X are released, it's not clear whether Apple will indefinitely continue to maintain the XProtect database of older versions such as 10.6. The security of obsolete system versions may eventually be degraded. Security updates to the code of obsolete systems will stop being released at some point, and that may leave them open to other kinds of attack besides malware.
       3. Starting with OS X 10.7.5, there has been a second layer of built-in malware protection, designated "Gatekeeper" by Apple. By default, applications and Installer packages downloaded from the network will only run if they're digitally signed by a developer with a certificate issued by Apple. Software certified in this way hasn't necessarily been tested by Apple, but you can be reasonably sure that it hasn't been modified by anyone other than the developer. His identity is known to Apple, so he could be held legally responsible if he distributed malware. That may not mean much if the developer lives in a country with a weak legal system (see below.)
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    4. Starting with OS X 10.8.3, a third layer of protection has been added: a "Malware Removal Tool" (MRT). MRT runs automatically in the background when you update the OS. It checks for, and removes, malware that may have evaded the other protections via a Java exploit (see below.) MRT also runs when you install or update the Apple-supplied Java runtime (but not the Oracle runtime.) Like XProtect, MRT is effective against known threats, but not against unknown ones. It notifies you if it finds malware, but otherwise there's no user interface to MRT.
    5. The built-in security features of OS X reduce the risk of malware attack, but they're not absolute protection. The first and best line of defense is always going to be your own intelligence. With the possible exception of Java exploits, all known malware circulating on the Internet that affects a fully-updated installation of OS X 10.6 or later takes the form of so-called "Trojan horses," which can only have an effect if the victim is duped into running them. The threat therefore amounts to a battle of wits between you and the malware attacker. If you're smarter than he thinks you are, you'll win.
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    Software of any kind downloaded from a BitTorrent or from a Usenet binary newsgroup is unsafe.
    Software that purports to help you do something that's illegal or that infringes copyright, such as saving streamed audio or video for reuse without permission, is unsafe. All YouTube "downloaders" are outside the safe harbor, though not all are necessarily harmful.
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            BANK 1/DIMM0
                4 GB DDR3 1333 MHz ok
            BANK 0/DIMM1
                4 GB DDR3 1333 MHz ok
            BANK 1/DIMM1
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        AMD Radeon HD 6750M - VRAM: 512 MB
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            Recovery HD (disk0s3) <not mounted>  [Recovery]: 650 MB
            Ken's HD (disk2) / : 498.88 GB (437.32 GB free)
                Encrypted AES-XTS Unlocked
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        HP ENVY 110 series
        Griffin Technology, Inc. PowerWave Composite
        Apple Inc. BRCM2046 Hub
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        Apple Inc. thunderbolt_bus
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        Mac App Store and identified developers
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        [loaded]    com.adobe.fpsaud.plist [Click for support]
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        [loaded]    com.shirtpocket.backupbytime.plist [Click for support]
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        Calendar    Application  (/Applications/Calendar.app)
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        QuickTime Plugin: Version: 7.7.3
        AdobePDFViewerNPAPI: Version: 11.0.10 - SDK 10.6 [Click for support]
        AdobePDFViewer: Version: 11.0.10 - SDK 10.6 [Click for support]
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        Default Browser: Version: 600 - SDK 10.10
        SharePointBrowserPlugin: Version: 14.4.9 - SDK 10.6 [Click for support]
        Silverlight: Version: 5.1.20913.0 - SDK 10.6 [Click for support]
        DirectorShockwave: Version: 12.0.2r122 - SDK 10.6 [Click for support]
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        1-ClickWeather
        AdBlock
    3rd Party Preference Panes: ℹ️
        Flash Player  [Click for support]
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        Skip System Files: NO
        Mobile backups: OFF
        Auto backup: YES
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            Ken's HD: Disk size: 498.88 GB Disk used: 61.55 GB
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            Total number of backups: 65
            Oldest backup: 2014-08-18 16:35:10 +0000
            Last backup: 2015-04-23 10:45:16 +0000
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                Backup size 348.75 GB > (Disk used 61.55 GB X 3)
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             2%    WindowServer
             2%    fontd
             0%    HP Scanner 3
             0%    taskgated
             0%    dpd
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        872 MB    kernel_task
        115 MB    mds_stores
        98 MB    mdworker(7)
        82 MB    opendirectoryd
        82 MB    loginwindow
    Virtual Memory Information: ℹ️
        13.00 GB    Free RAM
        3.08 GB    Used RAM
        0 B    Swap Used
    Diagnostics Information: ℹ️
        Apr 23, 2015, 07:54:16 AM    Self test - passed
        Apr 23, 2015, 04:53:26 AM    /Library/Logs/DiagnosticReports/firefox_2015-04-23-045326_[redacted].cpu_resour ce.diag [Click for details]
        Apr 23, 2015, 03:29:53 AM    /Library/Logs/DiagnosticReports/Disk Utility_2015-04-23-032953_[redacted].cpu_resource.diag [Click for details]
        Apr 22, 2015, 07:59:05 AM    /Library/Logs/DiagnosticReports/firefox_2015-04-22-075905_[redacted].cpu_resour ce.diag [Click for details]

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