Mavericks freezing even after clean installation. Help me, please!

Hi,

I'm having some issues with my Mavericks in my MacBook Pro Late 2011 (below you'll find my system information from EtreCheck).

I've tried update my Mountain Lion to Mavericks (10.9). The installation went well, but after that the OS has freezed several times, mainly when I was using iPhoto and Firefox (or Safari) together. My iPhoto library has more than 200 GB. I needed to forcely restart the machine every time the freezing ocurred. Important: the freezing was not completely; I could do things like show the desktop (I use one hot corner for that), but couldn't open or close programs.

I've got very frustrated and thought about downgrading to ML.

But I tried to do a clean installtation of Mavericks (10.9.1). I did that, but problems continued (different, but continued).

First, I've got a strange message saying that I run out of memory application (same as this one: http://www.michaelkummer.com/wp-content/uploads/2013/10/2013-10-27-at-2.25-PM-2x .png). This problem didn't happen anymore (maybe because I've deleted all my Internet accounts, as suggested by someone here, because I've received some Keychain's messages asking me to change my passwords).

The freezing problem continues now, but a little differently. Sometimes, when I open my MB Pro display, the screen gets blank and didn't appear nothing in it, and I need to forcely restart it frequently.

Well, that's it. I'm seriously considering to do the downgrade, but decided to try getting help here with you, all the experts and good people.

Thank you in advance!

Hardware Information:

MacBook Pro (13-inch, Late 2011)

MacBook Pro - model: MacBookPro8,1

1 2.4 GHz Intel Core i5 CPU: 2 cores

8 GB RAM

Video Information:

Intel HD Graphics 3000 - VRAM: 512 MB

System Software:

OS X 10.9.1 (13B42) - Uptime: 0 days 0:29:12

Disk Information:

SAMSUNG HN-M101MBB disk0 : (1 TB)

EFI (disk0s1) <not mounted>: 209,7 MB

OS X (disk0s2) /: 999,35 GB (382,8 GB free)

Recovery HD (disk0s3) <not mounted>: 650 MB

OPTIARC DVD RW AD-5970H

USB Information:

Apple Computer, Inc. IR Receiver

Apple Inc. FaceTime HD Camera (Built-in)

Apple Inc. Apple Internal Keyboard / Trackpad

Apple Inc. BRCM2070 Hub

Apple Inc. Bluetooth USB Host Controller

FireWire Information:

Thunderbolt Information:

Apple Inc. thunderbolt_bus

Kernel Extensions:

Problem System Launch Daemons:

Problem System Launch Agents:

Launch Daemons:

[System] com.adobe.fpsaud.plist 3rd-Party support link

Launch Agents:

User Launch Agents:

[not loaded] com.google.keystone.agent.plist 3rd-Party support link

User Login Items:

iTunesHelper

Internet Plug-ins:

FlashPlayer-10.6: Version: 12.0.0.38 - SDK 10.6 3rd-Party support link

Flash Player: Version: 12.0.0.38 - SDK 10.6 3rd-Party support link

QuickTime Plugin: Version: 7.7.3

Default Browser: Version: 537 - SDK 10.9

Audio Plug-ins:

BluetoothAudioPlugIn: Version: 1.0 - SDK 10.9

AirPlay: Version: 1.9 - SDK 10.9

AppleAVBAudio: Version: 2.0.0 - SDK 10.9

iSightAudio: Version: 7.7.3 - SDK 10.9

3rd Party Preference Panes:

Flash Player 3rd-Party support link

Bad Fonts:

None

Old Applications:

None

Time Machine:

Mobile backups: OFF

Auto backup: NO - Auto backup turned off

Volumes being backed up:

OS X: Disk size: 930.71 GB Disk used: 574.20 GB

Destinations:

TeraMacBKP [Local] (Last used)

Total size: 0 B

Total number of backups: 6

Oldest backup: 2013-09-15 16:04:38 +0000

Last backup: 2014-01-20 03:36:50 +0000

Size of backup disk: Too small

Backup size 0 B < (Disk used 574.20 GB X 3)

Time Machine details may not be accurate.

All volumes being backed up may not be listed.

Top Processes by CPU:

4% WindowServer

2% hidd

2% EtreCheck

0% coreservicesd

0% mds

Top Processes by Memory:

123 MB mds_stores

123 MB com.apple.WebKit.WebContent

115 MB Safari

115 MB com.apple.IconServicesAgent

49 MB WindowServer

Virtual Memory Information:

5.07 GB Free RAM

1.47 GB Active RAM

114 MB Inactive RAM

1.35 GB Wired RAM

337 MB Page-ins

0 B Page-outs