Can't install software on my Mac OS X 10.9.4

Question

Hello everyone,
I seem to have a problem installing new software... For some reason I can't install anything, the installer opens and I follow every step, but in the installation step, the bar just keeps moving but never actually moves as in completing the bar... I tried update from the app store and I can't, I press on update and it stays selected but nothing happens... I tried manually install 10.9.5, no luck, I tried with other softwares like, Teamviewer (which i really need to install), and Java.. but all is the same in all of them.
Can someone please help me? I need my computer for school and work and this can't happen ... :s
I'll be happy to send anyone images of the problem if I wasn't as clear as I wanted to be lol
English is not my main language
Thanks in advance,
Ricardo Santos

Answer 1

This is the report from http://www.etresoft.com/etrecheck
EtreCheck version: 1.9.15 (52)
Report generated 30 de Setembro de 2014 às 08:27:09 WEST
Hardware Information: ?
  MacBook Air (13-inch, Late 2010) (Verified)
  MacBook Air - model: MacBookAir3,2
  1 1.86 GHz Intel Core 2 Duo CPU: 2 cores
  2 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 8:14:9
Disk Information: ?
  APPLE SSD TS256C disk0 : (251 GB)
  S.M.A.R.T. Status: Verified
  EFI (disk0s1) <not mounted>: 209,7 MB
  Macintosh HD (disk0s2) / [Startup]: 205,14 GB (12,77 GB free) (Low!)
  Recovery HD (disk0s3) <not mounted>: 650 MB
  BOOTCAMP (disk0s4) /Volumes/BOOTCAMP: 45 GB (1,59 GB free)
USB Information: ?
  Apple Inc. FaceTime Camera (Built-in)
  Apple Internal Memory Card Reader
  Apple Inc. BRCM2070 Hub
  Apple Inc. Bluetooth USB Host Controller
  Apple Inc. Apple Internal Keyboard / Trackpad
Configuration files: ?
  /etc/hosts - Count: 15
Gatekeeper: ?
  Anywhere
Startup Items: ?
  MATLABLmgr: Path: /Library/StartupItems/MATLABLmgr
Problem System Launch Daemons: ?
  [failed] com.apple.installd.plist
Launch Daemons: ?
  [loaded] com.adobe.fpsaud.plist Support
  [loaded] com.adobe.SwitchBoard.plist Support
  [loaded] com.microsoft.office.licensing.helper.plist Support
  [loaded] com.oracle.java.Helper-Tool.plist Support
  [loaded] com.oracle.java.JavaUpdateHelper.plist Support
  [running] com.siber.gs-server.plist Support
  [loaded] org.macosforge.xquartz.privileged_startx.plist Support
Launch Agents: ?
  [not loaded] com.adobe.AAM.Updater-1.0.plist Support
  [loaded] com.adobe.CS5ServiceManager.plist Support
  [loaded] com.oracle.java.Java-Updater.plist Support
  [loaded] com.paragon.updater.plist Support
  [loaded] org.macosforge.xquartz.startx.plist Support
User Launch Agents: ?
  [failed] com.apple.CSConfigDotMacCert-[...]@me.com-SharedServices.Agent.plist
  [loaded] com.google.keystone.agent.plist Support
  [running] com.spotify.webhelper.plist Support
User Login Items: ?
  iTunesHelper
  Dropbox
  SpeechSynthesisServer
  HPEventHandler
Internet Plug-ins: ?
  JavaAppletPlugin: Version: Java 7 Update 60 Check version
  FlashPlayer-10.6: Version: 15.0.0.152 - SDK 10.6 Support
  QuickTime Plugin: Version: 7.7.3
  Flash Player: Version: 15.0.0.152 - SDK 10.6 Support
  Default Browser: Version: 537 - SDK 10.9
  SharePointBrowserPlugin: Version: 14.4.4 - SDK 10.6 Support
  Unity Web Player: Version: UnityPlayer version 4.3.5f1 - SDK 10.6 Support
  iPhotoPhotocast: Version: 7.0
Safari Extensions: ?
  AdBlock-2
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 Internet Plug-ins ?
  Picasa: Version: 1.0 - SDK 10.6 Support
3rd Party Preference Panes: ?
  Flash Player  Support
  Growl  Support
  Java  Support
  Tuxera NTFS  Support
Time Machine: ?
  Skip System Files: NO
  Mobile backups: OFF
  Auto backup: YES
  Volumes being backed up:
  Macintosh HD: Disk size: 191.05 GB Disk used: 179.16 GB
  Destinations:
  Time Machine [Local] (Last used)
  Total size: 465.66 GB
  Total number of backups: 4
  Oldest backup: 2014-08-29 11:05:22 +0000
  Last backup: 2014-09-21 21:27:51 +0000
  Size of backup disk: Too small
  Backup size 465.66 GB < (Disk used 179.16 GB X 3)
  Time Machine details may not be accurate.
  All volumes being backed up may not be listed.
Top Processes by CPU: ?
      6% WindowServer
      4% Dropbox
      2% Installer
      0% fontd
      0% System Events
Top Processes by Memory: ?
  98 MB Safari
  53 MB Finder
  39 MB WindowServer
  35 MB Console
  31 MB Installer
Virtual Memory Information: ?
  32 MB Free RAM
  588 MB Active RAM
  559 MB Inactive RAM
  329 MB Wired RAM
  1.13 GB Page-ins
  15 MB Page-outs
I'll also take a look at them but today it's a busy day without the computer, I'll come back later.
Thanks again