Screen Freezes on Mid 2012 MacBook Pro 13-inch

My computer freezes at random intervals, the screen locks up completely (cursor included) and only responds after holding the power button and hard rebooting. This problem started about 6 months ago and progressed from freezing twice a day to the point where the computer wouldn't even start up. The store of purchase sent it out and returned it w/in a week. The computer worked fine for about 2 months, but now the problem has come back. Any advice would be greatly appreciated. My Etresoft report is as follows

Problem description:

My computer frequently locks. The screen freezes and the mouse is deactivated. The only way to resolve the issue is to hard reboot my computer. It happens at random times, but seems to also occur when I move my computer even slightly. The screen lock associated with moving the computer is inconsistent; sometimes it keeps working fine after being moved.

Problem description:

My computer frequently locks. The screen freezes and the mouse is deactivated. The only way to resolve the issue is to hard reboot my computer. It happens at random times, but seems to also occur when I move my computer even slightly. The screen lock associated with moving the computer is inconsistent; sometimes it keeps working fine after being moved.

EtreCheck version: 2.1.8 (121)

Report generated March 3, 2015 at 6:15:36 PM AST

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Hardware Information: ℹ️

MacBook Pro Intel Core i7, 15" (Mid 2012)

MacBook Pro - model: MacBookPro9,2

1 2.5 GHz Intel Core i5 CPU: 2-core

4 GB RAM Upgradeable

BANK 0/DIMM0

2 GB DDR3 1600 MHz ok

BANK 1/DIMM0

2 GB DDR3 1600 MHz ok

Bluetooth: Good - Handoff/Airdrop2 supported

Wireless: en1: 802.11 a/b/g/n

Battery Health: Normal - Cycle count 313

Video Information: ℹ️

Intel HD Graphics 4000

Color LCD 1280 x 800

System Software: ℹ️

OS X 10.9.5 (13F34) - Time since boot: 0:58:3

Disk Information: ℹ️

APPLE HDD HTS545050A7E362 disk0 : (500.11 GB)

EFI (disk0s1) <not mounted> : 210 MB

Macintosh HD (disk0s2) / : 499.25 GB (425.34 GB free)

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

HL-DT-ST DVDRW GS41N

USB Information: ℹ️

Apple Inc. BRCM20702 Hub

Apple Inc. Bluetooth USB Host Controller

Apple Inc. Apple Internal Keyboard / Trackpad

Apple Computer, Inc. IR Receiver

Apple Inc. FaceTime HD Camera (Built-in)

Thunderbolt Information: ℹ️

Apple Inc. thunderbolt_bus

Gatekeeper: ℹ️

Mac App Store and identified developers

Kernel Extensions: ℹ️

/Library/Extensions

[loaded] com.avatron.AVExFramebuffer (1.7 - SDK 10.10) [Click for support]

[loaded] com.avatron.AVExVideo (1.7 - SDK 10.10) [Click for support]

Launch Agents: ℹ️

[loaded] com.examsoft.softest.plist [Click for support]

Launch Daemons: ℹ️

[loaded] com.adobe.fpsaud.plist [Click for support]

[running] com.examsoft.softest.service.plist [Click for support]

User Login Items: ℹ️

Flux Application (/Applications/Flux.app)

iTunesHelper Application (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)

Moveslink2 UNKNOWN (missing value)

Caffeine Application (/Applications/Caffeine.app)

Dropbox Application (/Applications/Dropbox.app)

Internet Plug-ins: ℹ️

FlashPlayer-10.6: Version: 16.0.0.305 - SDK 10.6 [Click for support]

QuickTime Plugin: Version: 7.7.3

Flash Player: Version: 16.0.0.305 - SDK 10.6 Cannot contact Adobe

CANONiMAGEGATEWAYDL: Version: 3.1.0.2 [Click for support]

Default Browser: Version: 537 - SDK 10.9

Silverlight: Version: 5.1.30514.0 - SDK 10.6 [Click for support]

DirectorShockwave: Version: 12.1.0r150 - SDK 10.6 [Click for support]

JavaAppletPlugin: Version: 14.9.0 - SDK 10.7 Check version

3rd Party Preference Panes: ℹ️

Flash Player [Click for support]

Time Machine: ℹ️

Auto backup: YES

Volumes being backed up:

Macintosh HD: Disk size: 499.25 GB Disk used: 73.91 GB

Destinations:

Med School [Local]

Total size: 100.00 GB

Total number of backups: 0

Oldest backup: -

Last backup: -

Size of backup disk: Too small

Backup size 100.00 GB < (Disk used 73.91 GB X 3)

Top Processes by CPU: ℹ️

4% WindowServer

1% fontd

0% AppleSpell

0% Flux

0% aosnotifyd

Top Processes by Memory: ℹ️

159 MB Safari

149 MB com.apple.WebKit.WebContent

112 MB com.apple.IconServicesAgent

94 MB Pages

73 MB WindowServer

Virtual Memory Information: ℹ️

937 MB Free RAM

1.71 GB Active RAM

805 MB Inactive RAM

841 MB Wired RAM

499 MB Page-ins

0 B Page-outs

Diagnostics Information: ℹ️

Mar 3, 2015, 05:20:00 PM /Library/Logs/DiagnosticReports/VLC_2015-03-03-172000_[redacted].hang

Mar 3, 2015, 05:15:00 PM Self test - passed

Mar 1, 2015, 04:04:07 PM /Library/Logs/DiagnosticReports/mds_2015-03-01-160407_[redacted].crash

Feb 26, 2015, 09:55:18 AM /Library/Logs/DiagnosticReports/Kernel_2015-02-26-095518_[redacted].panic [Click for details]