Mac won't connect to internet after sleep

Hi,
I've seen this problem to more and more users.
After i have updated Mac OS to 10.5.7 my Macbook won't connect to my airport express after waking from sleep. Even worse, when i wake my mac, all the computers from my wireless network loose their connectivity to Internet. I have to restart the Airport and the Macbook everytime. You can imagine this is becoming frustrating.
The funny part is that all the other laptops which have windows on them work without problems so i'm guessing this is related to Mac OS and not the Airport.
based on what i have read so far on the forums, i've tried to reset the connection, to change it's name, encryption, update Airport firmware version...everything.. No luck. The only thing that gets my connection back is to do a restart both to Macbook and Airport.
Does anyone have a solution to this issue?
Thanks,

Is anyone else having this issue?

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    Report generated February 11, 2015 at 8:15:48 PM EST
    Download EtreCheck from http://etresoft.com/etrecheck
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        iMac (Retina 5K, 27-inch, Late 2014) (Technical Specifications)
        iMac - model: iMac15,1
        1 4 GHz Intel Core i7 CPU: 4-core
        16 GB RAM Upgradeable
            BANK 0/DIMM0
                8 GB DDR3 1600 MHz ok
            BANK 1/DIMM0
                8 GB DDR3 1600 MHz ok
            BANK 0/DIMM1
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            BANK 1/DIMM1
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            iMac spdisplays_5120x2880Retina
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            Macintosh HD (disk2) / : 3.11 TB (2.65 TB free)
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                Core Storage: disk1s2 3.00 TB Online
        APPLE HDD ST3000DM001 disk1 : (3 TB)
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            /Applications/Parallels Desktop.app
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        [not loaded]    com.parallels.kext.netbridge (9.0 24251.1052177) [Click for support]
        [not loaded]    com.parallels.kext.usbconnect (9.0 24251.1052177) [Click for support]
        [not loaded]    com.parallels.kext.vnic (9.0 24251.1052177) [Click for support]
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        [not loaded]    com.Belcarra.iokit.USBLAN_usbpart (2.0.2) [Click for support]
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        [not loaded]    com.RemoteControl.USBLAN.usbpart (2.0.6) [Click for support]
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            /System/Library/Extensions/RemoteControl.USBLAN_usbpart.kext/Contents/PlugIns
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        TiVoDesktop: Path: /Library/StartupItems/TiVoDesktop
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    Launch Agents: ℹ️
        [running]    com.bjango.istatmenusagent.plist [Click for support]
        [running]    com.bjango.istatmenusnotifications.plist [Click for support]
        [loaded]    com.google.keystone.agent.plist [Click for support]
        [running]    com.logitech.manager.daemon.plist [Click for support]
        [failed]    com.logmein.LMILaunchAgentFixer.plist [Click for support]
        [running]    com.logmein.logmeingui.plist [Click for support]
        [running]    com.logmein.logmeinguiagent.plist [Click for support]
        [not loaded]    com.logmein.logmeinguiagentatlogin.plist [Click for support]
        [loaded]    com.oracle.java.Java-Updater.plist [Click for support]
        [running]    com.parallels.mobile.prl_deskctl_agent.launchagent.plist [Click for support]
        [running]    com.sophos.uiserver.plist [Click for support]
    Launch Daemons: ℹ️
        [loaded]    com.adobe.fpsaud.plist [Click for support]
        [running]    com.bjango.istatmenusdaemon.plist [Click for support]
        [loaded]    com.bombich.ccc.plist [Click for support]
        [running]    com.bombich.ccchelper.plist [Click for support]
        [loaded]    com.google.keystone.daemon.plist [Click for support]
        [running]    com.logmein.logmeinserver.plist [Click for support]
        [loaded]    com.logmein.raupdate.plist [Click for support]
        [loaded]    com.macpaw.CleanMyMac2.Agent.plist [Click for support]
        [failed]    com.micromat.TechToolProDaemon.plist [Click for support]
        [loaded]    com.oracle.java.Helper-Tool.plist [Click for support]
        [loaded]    com.oracle.java.JavaUpdateHelper.plist [Click for support]
        [running]    com.parallels.mobile.dispatcher.launchdaemon.plist [Click for support]
        [loaded]    com.parallels.mobile.kextloader.launchdaemon.plist [Click for support]
        [running]    com.sophos.common.servicemanager.plist [Click for support]
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        [loaded]    com.adobe.ARM.[...].plist [Click for support]
        [running]    com.amazon.music.plist [Click for support]
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        [loaded]    com.macpaw.CleanMyMac2Helper.diskSpaceWatcher.plist [Click for support]
        [loaded]    com.macpaw.CleanMyMac2Helper.scheduledScan.plist [Click for support]
        [loaded]    com.macpaw.CleanMyMac2Helper.trashWatcher.plist [Click for support]
    User Login Items: ℹ️
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        iTunesHelper    Application  (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
        Fantastical    Application  (/Applications/Fantastical.app)
        Dropbox    Application  (/Applications/Dropbox.app)
        Caffeine    Application  (/Applications/Caffeine.app)
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        EvernoteHelper    Application  (/Applications/Evernote.app/Contents/Library/LoginItems/EvernoteHelper.app)
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        AdobePDFViewerNPAPI: Version: 10.1.13 [Click for support]
        Flash Player: Version: 16.0.0.305 - SDK 10.6 [Click for support]
        JoostPlugin: Version: 0.13.8 [Click for support]
        AdobePDFViewer: Version: 10.1.13 [Click for support]
        LogMeInSafari32: Version: 1.0.586 [Click for support]
        Photo Center Plugin: Version: Photo Center Plugin 1.1.2.0 [Click for support]
        WidevineMediaOptimizer: Version: 6.0.0.12757 - SDK 10.7 [Click for support]
        iPhotoPhotocast: Version: 7.0
        RealPlayer Plugin: Version: Unknown
        QuickTime Plugin: Version: 7.7.3
        LogMeInSafari64: Version: 1.0.586 [Click for support]
        FlashPlayer-10.6: Version: 16.0.0.305 - SDK 10.6 [Click for support]
        CitrixICAClientPlugIn: Version: 11.4.0 - SDK 10.0 [Click for support]
        DivXBrowserPlugin: Version: 2.2 [Click for support]
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    Hi Steven, and a warm welcome to the forums!
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