Can't install software on my Mac OS X 10.9.4

I've tried every option you said and nothing, i still can't install anything but now, sometimes gives me an error or just keeps spinning the bar never moves from "setting up installation" ....
Do you have any other advice?

No I don't have any anti-virus software, the only thing i have is CCleaner (which i use), battery health and memory clean (which i don't) and the last program I installed was iStat widget and it came with something weird with it... but i don't remember the website, but i still have the file

I just did, still nothing.... I'm really starting to freak out and think that my only option is to do a complete system re installation

Hey again, and because you seem to know a bit of mac problems and how macs actually work, i was able to find the last software I did install and nothing here smells right:
So I downloaded from:

http://istat-pro.soft32.com

and inside was a software called installed.app (i found it very odd but i installed anyway....)

now, with a little of digging the guy who made the software is this guy:

http://www.mirceasoaica.com

Another strange thing, and this is a classic case of BS (sorry my language, i'm just mad) i found, when exploring the package the in the resources/enIproj/credits.rtf I found this written :

Engineering:

Some people

Human Interface Design:

Some other people

Testing:

Hopefully not nobody

Documentation:

Whoever

With special thanks to:

Mom

This is got to be the software that messed up with my system..

I'm not an expert in programing but after i ran this, i did get what i was looking for and i didn't found any sign of installer.app in my pc so I was happy, but apparently this **** must have ****** up my system....
any ideas?

By the way, when installing i was able to go to regists folder and some of my error were in the PackageKit which does make sense...

any ideas on how can i get out of this mess with reinstalling everything? :s

You are absolutely right, i shouldn't download from these websites and I'll make sure I'll never do it again..

And other thing is that sometimes it gives me an error and sometimes it doesn't.... so this times didn't give me an error, the progress bar just kept on spinning.

Anyway, this is the log:

Marcador - 30/09/2014, 08:24:05

Sep 30 08:24:08 macbook-ricardo.lan Installer[1391]: LSExceptions [0x7ff458c379f0] loaded

Sep 30 08:24:08 macbook-ricardo.lan Installer[1391]: @(#)PROGRAM:Install PROJECT:Install-846

Sep 30 08:24:08 macbook-ricardo.lan Installer[1391]: @(#)PROGRAM:Installer PROJECT:Installer-721

Sep 30 08:24:08 macbook-ricardo.lan Installer[1391]: Hardware: MacBookAir3,2 @ 1.86 GHz (x 2), 2048 MB RAM

Sep 30 08:24:08 macbook-ricardo.lan Installer[1391]: Running OS Build: Mac OS X 10.9.4 (13E28)

Sep 30 08:24:08 macbook-ricardo.lan Installer[1391]: Env: PATH=/usr/bin:/bin:/usr/sbin:/sbin

Sep 30 08:24:08 macbook-ricardo.lan Installer[1391]: Env: TMPDIR=/var/folders/2j/m_zl3h1n67g67hx69g222w600000gn/T/

Sep 30 08:24:08 macbook-ricardo.lan Installer[1391]: Env: SHELL=/bin/bash

Sep 30 08:24:08 macbook-ricardo.lan Installer[1391]: Env: HOME=/Users/Ricardo

Sep 30 08:24:08 macbook-ricardo.lan Installer[1391]: Env: USER=Ricardo

Sep 30 08:24:08 macbook-ricardo.lan Installer[1391]: Env: LOGNAME=Ricardo

Sep 30 08:24:08 macbook-ricardo.lan Installer[1391]: Env: SSH_AUTH_SOCK=/tmp/launch-L5Tcae/Listeners

Sep 30 08:24:08 macbook-ricardo.lan Installer[1391]: Env: Apple_PubSub_Socket_Render=/tmp/launch-yALaj8/Render

Sep 30 08:24:08 macbook-ricardo.lan Installer[1391]: Env: DISPLAY=/tmp/launch-C7TLJ2/org.macosforge.xquartz:0

Sep 30 08:24:08 macbook-ricardo.lan Installer[1391]: Env: COMMAND_MODE=unix2003

Sep 30 08:24:08 macbook-ricardo.lan Installer[1391]: Env: __CHECKFIX1436934=1

Sep 30 08:24:08 macbook-ricardo.lan Installer[1391]: Env: __CF_USER_TEXT_ENCODING=0x1F5:0:10

Sep 30 08:24:08 macbook-ricardo.lan Installer[1391]: TeamViewer 9.0.32669 Installation Log

Sep 30 08:24:08 macbook-ricardo.lan Installer[1391]: Opened from: /Volumes/TeamViewer/Install TeamViewer.pkg

Sep 30 08:24:08 macbook-ricardo.lan Installer[1391]: Product archive /Volumes/TeamViewer/Install TeamViewer.pkg trustLevel=202

Sep 30 08:24:16 macbook-ricardo.lan Installer[1391]: InstallerStatusNotifications plugin loaded

Sep 30 08:24:18 macbook-ricardo.lan Installer[1391]: LSExceptions [0x7ff458c379f0] unloaded

Sep 30 08:24:21 macbook-ricardo.lan runner[1394]: Administrator authorization granted.

Sep 30 08:24:21 macbook-ricardo.lan Installer[1391]: =============================================================================== =

Sep 30 08:24:21 macbook-ricardo.lan Installer[1391]: User picked Standard Install

Sep 30 08:24:21 macbook-ricardo.lan Installer[1391]: Choices selected for installation:

Sep 30 08:24:21 macbook-ricardo.lan Installer[1391]: Instalar: "TeamViewer"

Sep 30 08:24:21 macbook-ricardo.lan Installer[1391]: Install TeamViewer.pkg#TeamViewerApp.pkg : com.teamviewer.teamviewer9 : 9.0.32669

Sep 30 08:24:21 macbook-ricardo.lan Installer[1391]: Install TeamViewer.pkg#Font.pkg : com.teamviewer.teamviewer9Font : 9.0.32669

Sep 30 08:24:21 macbook-ricardo.lan Installer[1391]: Install TeamViewer.pkg#LauncherFull.pkg : com.teamviewer.teamviewer9Agent : 9.0.32669

Sep 30 08:24:21 macbook-ricardo.lan Installer[1391]: Install TeamViewer.pkg#FullRestarterPackage.pkg : com.teamviewer.teamviewer9Restarter : 9.0.32669

Sep 30 08:24:21 macbook-ricardo.lan Installer[1391]: =============================================================================== =

Sep 30 08:24:21 macbook-ricardo.lan Installer[1391]: It took 0.00 seconds to summarize the package selections.

Sep 30 08:24:21 macbook-ricardo.lan Installer[1391]: -[IFDInstallController(Private) _buildInstallPlan]: location = file://localhost

Sep 30 08:24:21 macbook-ricardo.lan Installer[1391]: -[IFDInstallController(Private) _buildInstallPlan]: file://localhost/Volumes/TeamViewer/Install%20TeamViewer.pkg#TeamViewerApp.pkg

Sep 30 08:24:21 macbook-ricardo.lan Installer[1391]: -[IFDInstallController(Private) _buildInstallPlan]: file://localhost/Volumes/TeamViewer/Install%20TeamViewer.pkg#Font.pkg

Sep 30 08:24:21 macbook-ricardo.lan Installer[1391]: -[IFDInstallController(Private) _buildInstallPlan]: file://localhost/Volumes/TeamViewer/Install%20TeamViewer.pkg#LauncherFull.pkg

Sep 30 08:24:21 macbook-ricardo.lan Installer[1391]: -[IFDInstallController(Private) _buildInstallPlan]: file://localhost/Volumes/TeamViewer/Install%20TeamViewer.pkg#FullRestarterPacka ge.pkg

Sep 30 08:24:21 macbook-ricardo.lan Installer[1391]: Set authorization level to root for session

Sep 30 08:24:21 macbook-ricardo.lan Installer[1391]: Will use PK session

Sep 30 08:24:21 macbook-ricardo.lan Installer[1391]: Starting installation:

I'll try you talked about on your last message and btw, I can't thank enough for trying to help me with my problem 🙂 I just hope this works!

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

My RAM as always been this way and i can't update it, and ir always worked, so that's not The reason. About disk space is tha same thing, i think 10 GB of free disk space won't do any diference. About The host file, I know but i did it because i needed it for a software i use at work ... And it's been like this since 2013 and I've instaled other aplications before, again, not a problem