How to fix my slow wifi on my Macbook Air?

Hello!
I have been having issues with wifi on my late 2010 Macbook Air. I have OSX 10.9.4. I notice that my wireless issues are fine if I'm within 10 feet from my wireless router. If I boot my same MBA using Windows, I have no issues what so ever and can even go outside and have great speeds. I have tried different browsers on the mac side with no change, I have also tried different networks with no change. I have used my fiancé's MBP and she has great connectivity throughout the house. So, I have ruled out a network issue and a hardware issue as the internet is fine on my MBA when using the windows side.
I do have to mention that my screen was replaced a little over two years ago and did read that some people who had repairs done to their laptops sometimes found that their antennae was not properly hooked back up, but again, I'm ruling this out because I believe I would still have connectivity issues on the windows side of my MBA?
I have done some research here and tried disabling BT with no luck. I also tried fixed 2.4 GHz and 5.0 GHz channels with no luck either. Also, in my research, I found a neat app called EtreCheck and have posted those results below. Any tips or trouble shooting I can try from here would be greatly appreciated!
EtreCheck version: 1.9.12 (48)
Report generated July 8, 2014 at 7:14:07 AM EDT
Hardware Information:
MacBook Air (13-inch, Late 2010) (Verified)
MacBook Air - model: MacBookAir3,2
1 2.13 GHz Intel Core 2 Duo CPU: 2 cores
4 GB RAM
Video Information:
NVIDIA GeForce 320M - VRAM: 256 MB
Color LCD 1440 x 900
System Software:
OS X 10.9.4 (13E28) - Uptime: 0 days 0:28:55
Disk Information:
APPLE SSD TS256C disk0 : (251 GB)
EFI (disk0s1) <not mounted>: 209.7 MB
Macintosh HD (disk0s2) / [Startup]: 222.82 GB (16.94 GB free)
Recovery HD (disk0s3) <not mounted>: 650 MB
Windows HD (disk0s4) /Volumes/Windows HD: 27.32 GB (1.08 GB free)
USB Information:
Apple Internal Memory Card Reader
Apple Inc. FaceTime Camera (Built-in)
Apple Inc. BRCM2070 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Inc. Apple Internal Keyboard / Trackpad
Configuration files:
/etc/sysctl.conf - Exists
Gatekeeper:
Mac App Store and identified developers
Kernel Extensions:
[not loaded] com.FTDI.driver.FTDIUSBSerialDriver (2.2.10) Support
[not loaded] com.iospirit.driver.rbiokithelper (1.5.5) Support
[not loaded] com.kodak.print.printerdock.merge (1.0.0) Support
[not loaded] com.option.driver.Option72 (2.15.0) Support
[not loaded] com.option.driver.OptionHS (3.26.0) Support
[not loaded] com.option.driver.OptionMSD (1.21.0) Support
Launch Daemons:
[loaded] com.adobe.fpsaud.plist Support
[loaded] com.oracle.java.Helper-Tool.plist Support
[loaded] com.sonos.smbbump.plist Support
[running] com.trusteer.rooks.rooksd.plist Support
Launch Agents:
[running] com.flipvideo.FlipShare.AutoRun.plist Support
[loaded] com.oracle.java.Java-Updater.plist Support
[running] com.trusteer.rapport.rapportd.plist Support
User Launch Agents:
[loaded] com.adobe.ARM.[...].plist Support
[loaded] com.google.keystone.agent.plist Support
[loaded] com.iLike.Agent.plist Support
[not loaded] com.valvesoftware.steam.ipctool.plist Support
[running] ws.agile.1PasswordAgent.plist Support
User Login Items:
Messages
Dropbox
Google Drive
Internet Plug-ins:
Flip4Mac WMV Plugin: Version: 3.2.0.16   - SDK 10.8 Support
FlashPlayer-10.6: Version: 13.0.0.214 - SDK 10.6 Support
Default Browser: Version: 537 - SDK 10.9
Flash Player: Version: 13.0.0.214 - SDK 10.6 Outdated! Update
AdobePDFViewer: Version: 9.5.5 Support
JavaAppletPlugin: Version: Java 7 Update 25 Check version
QuickTime Plugin: Version: 7.7.3
Google Earth Web Plug-in: Version: 5.1 Support
Silverlight: Version: 4.0.51204.0 Support
iPhotoPhotocast: Version: 7.0 - SDK 10.8
Safari Extensions:
Twitter for Safari: Version: 1.02
1-ClickWeather: Version: 1.0
1Password: Version: 3.9.20
Add To Amazon Wish List: Version: 1.4
Bing Highlights: Version: 1.0.24
Audio Plug-ins:
BluetoothAudioPlugIn: Version: 1.0 - SDK 10.9
AirPlay: Version: 2.0 - SDK 10.9
AppleAVBAudio: Version: 203.2 - SDK 10.9
iSightAudio: Version: 7.7.3 - SDK 10.9
iTunes Plug-ins:
Quartz Composer Visualizer: Version: 1.4 - SDK 10.9
User iTunes Plug-ins:
iLike: Version: 1.0 Support
PPC Bundle: Version: (null) Support
iLike Bundle: Version: (null) Support
Tiger Bundle: Version: (null) Support
User Internet Plug-ins:
Move-Media-Player: Version: npmnqmp 071500000273 Support
Unity Web Player: Version: UnityPlayer version 2.6.1f3 Support
WebEx64: Version: 1.0 - SDK 10.6 Support
3rd Party Preference Panes:
Flash Player Support
Flip4Mac WMV Support
Java Support
MediaCentral Support
Perian Support
Trusteer Endpoint Protection Support
Time Machine:
Skip System Files: NO
Mobile backups: OFF
Auto backup: YES
Volumes being backed up:
Macintosh HD: Disk size: 207.52 GB Disk used: 191.74 GB
Destinations:
Data [Network] (Last used)
Total size: 2
Total number of backups: 156
Oldest backup: 2010-11-24 08:54:54 +0000
Last backup: 2014-07-07 23:27:21 +0000
Size of backup disk: Excellent
Backup size 2 > (Disk size 207.52 GB X 3)
Time Machine details may not be accurate.
All volumes being backed up may not be listed.
Top Processes by CPU:
      18% WindowServer
      7% PluginProcess
      4% com.apple.WebKit.Networking
      2% coreaudiod
      2% Safari
Top Processes by Memory:
152 MB Safari
90 MB rapportd
86 MB mds_stores
78 MB Dropbox
78 MB Messages
Virtual Memory Information:
593 MB Free RAM
1.78 GB Active RAM
887 MB Inactive RAM
538 MB Wired RAM
354 MB Page-ins
0 B Page-outs

Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login, by a peripheral device, by a font conflict, or by corruption of the file system or of certain system caches.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards, if applicable. Start up in safe mode and log in to the account with the problem. You must hold down the shift key twice: once when you turn on the computer, and again when you log in.
Note: If FileVault is enabled, or if a firmware password is set, or if the startup volume is a Fusion Drive or a software RAID, you can’t do this. Ask for further instructions.
Safe mode is much slower to start up and run than normal, with limited graphics performance, and some things won’t work at all, including sound output on certain models. The next normal startup may also be somewhat slow.
The login screen appears even if you usually login automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Test while in safe mode. Same problem?
After testing, restart as usual (not in safe mode) and verify that you still have the problem. Post the results of the test.

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Please read this whole message before doing anything.
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