Macbook pro 15 inch early 2011 blue screen, screen with lines, crashing but works on reboot?

My mac's speed has been fine, there is no noticeable slow down however about 2 months ago every so often in the middle of whatever I was doing I would get a blue screen, or a grey screen with lines, sometimes just a blue screen. Thats all the computer would show and there was nothing I could do except hold down the power button and reboot. Sometimes I've had to do this 8 times in a row because it will just go to a grey/light screen without showing the apple symbol (upon reboot), from here I'd hold down power again and sometimes/usually it starts back fine

I also can't seem to close firefox and reboot it

Here is my run of etrecheck. If someone could help that'd be amazing! I feel like this computer still has life in it and I just hate when a 2300 dollar piece of work is going to **** out in less than 10 years...maybe thats it natural life cycle but I didn't sign a form saying that.

EtreCheck version: 2.6.4 (224)

Report generated 11/26/15, 5:04 AM

Runtime 5:41

Download EtreCheck from http://etresoft.com/etrecheck

Click the [Click for support] links for help with non-Apple products.

Click the [Click for details] links for more information about that line.

Hardware Information: (What does this mean?)

MacBook Pro (15-inch, Early 2011)

[Click for Technical Specifications]

[Click for User Guide]

MacBook Pro - model: MacBookPro8,2

1 2.2 GHz Intel Core i7 CPU: 4-core

8 GB RAM Upgradeable

[Click for upgrade instructions]

BANK 0/DIMM0

4 GB DDR3 1333 MHz ok

BANK 1/DIMM0

4 GB DDR3 1333 MHz ok

Bluetooth: Old - Handoff/Airdrop2 not supported

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

Battery: Health = Normal - Cycle count = 1010 - SN = D861274005CDGDLAU

Video Information: (What does this mean?)

Intel HD Graphics 3000 - VRAM: 512 MB

Color LCD 1440 x 900

AMD Radeon HD 6750M - VRAM: 1024 MB

System Software: (What does this mean?)

OS X Mavericks 10.9.5 (13F34) - Time since boot: less than an hour

Disk Information: (What does this mean?)

TOSHIBA MQ01ABD100 disk0 : (1 TB) (Rotational)

EFI (disk0s1) <not mounted> : 210 MB

Macintosh HD (disk0s2) / : 999.35 GB (524.30 GB free)

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

MATSHITADVD-R UJ-8A8 ()

USB Information: (What does this mean?)

Apple Computer, Inc. IR Receiver

Apple Inc. FaceTime HD Camera (Built-in)

Apple Inc. BRCM2070 Hub

Apple Inc. Bluetooth USB Host Controller

Apple Inc. Apple Internal Keyboard / Trackpad

Thunderbolt Information: (What does this mean?)

Apple Inc. thunderbolt_bus

Gatekeeper: (What does this mean?)

Anywhere

Kernel Extensions: (What does this mean?)

/System/Library/Extensions

[not loaded] com.cisco.cscotun (1.0) [Click for support]

Startup Items: (What does this mean?)

vpnagentd: Path: /System/Library/StartupItems/vpnagentd

Startup items are obsolete in OS X Yosemite

Launch Agents: (What does this mean?)

[running] com.pharos.notify.plist [Click for support]

[running] com.pharos.popup.plist [Click for support]

Launch Daemons: (What does this mean?)

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

[loaded] com.malwarebytes.MBAMHelperTool.plist [Click for support]

[loaded] com.microsoft.office.licensing.helper.plist [Click for support]

User Launch Agents: (What does this mean?)

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

[failed] com.apple.CSConfigDotMacCert-[...]@me.com-SharedServices.Agent.plist - /System/Library/Frameworks/CoreServices.framework/Frameworks/OSServices.framewo rk/Versions/A/Support/CSConfigDotMacCert: Executable not found!

[loaded] com.facebook.videochat.[redacted].plist [Click for support]

[loaded] com.google.keystone.agent.plist [Click for support]

[failed] com.hp.printerAgent.plist [Click for support] [Click for details]

[running] com.spotify.webhelper.plist [Click for support]

User Login Items: (What does this mean?)

Steam UNKNOWN (missing value)

iTunesHelper UNKNOWN Hidden (missing value)

smcFanControl Application (~/Downloads/smcFanControl_2_3/smcFanControl.app)

AdobeResourceSynchronizer Application Hidden (/Applications/Adobe Reader.app/Contents/Support/AdobeResourceSynchronizer.app)

Dropbox UNKNOWN (missing value)

Spotify Application Hidden (/Applications/Spotify.app)

Other Apps: (What does this mean?)

[running] [0x0-0x2d02d].com.etresoft.EtreCheck

[running] com.GoPro.GoPro-Importer

[running] com.eidac.smcFanControl2.33648

[running] com.hp.devicemonitor

[running] com.spotify.client.39984

[running] jp.co.canon.cijscannerregister.34176

[running] org.mozilla.firefox.11120

Internet Plug-ins: (What does this mean?)

JavaAppletPlugin: Version: 14.9.0 - SDK 10.7 Check version

FlashPlayer-10.6: Version: 19.0.0.245 - SDK 10.6 [Click for support]

Default Browser: Version: 537 - SDK 10.9

AdobePDFViewerNPAPI: Version: 11.0.12 - SDK 10.6 [Click for support]

AdobePDFViewer: Version: 11.0.12 - SDK 10.6 [Click for support]

Flash Player: Version: 19.0.0.245 - SDK 10.6 Cannot contact Adobe

QuickTime Plugin: Version: 7.7.3

SharePointBrowserPlugin: Version: 14.3.9 - SDK 10.6 [Click for support]

Silverlight: Version: 5.1.30317.0 - SDK 10.6 [Click for support]

iPhotoPhotocast: Version: 7.0 - SDK 10.7

User internet Plug-ins: (What does this mean?)

Picasa: Version: 1.0 [Click for support]

Google Earth Web Plug-in: Version: 7.1 [Click for support]

Safari Extensions: (What does this mean?)

DivX Plus Web Player HTML5 <video>

3rd Party Preference Panes: (What does this mean?)

Flash Player [Click for support]

GoPro [Click for support]

Perian [Click for support]

Time Machine: (What does this mean?)

Auto backup: YES

Volumes being backed up:

Macintosh HD: Disk size: 999.35 GB Disk used: 475.05 GB

Destinations:

Untitled 1 [Local]

Total size: 999.75 GB

Total number of backups: 5

Oldest backup: 3/10/15, 5:50 AM

Last backup: 9/8/15, 7:40 PM

Size of backup disk: Too small

Backup size 999.75 GB < (Disk used 475.05 GB X 3)

Untitled [Local]

Total size: 999.10 GB

Total number of backups: 1

Oldest backup: 9/8/15, 6:13 PM

Last backup: 9/8/15, 6:13 PM

Size of backup disk: Too small

Backup size 999.10 GB < (Disk used 475.05 GB X 3)

Top Processes by CPU: (What does this mean?)

3% fontd

2% WindowServer

1% launchd(3)

1% UserEventAgent(2)

1% kernel_task

Top Processes by Memory: (What does this mean?)

670 MB kernel_task

262 MB firefox

229 MB Spotify Helper(2)

156 MB Finder

147 MB com.apple.IconServicesAgent

Virtual Memory Information: (What does this mean?)

4.46 GB Free RAM

3.53 GB Used RAM (2.05 GB Cached)

0 B Swap Used

Diagnostics Information: (What does this mean?)

Apr 14, 2016, 07:06:23 PM /Library/Logs/DiagnosticReports/UserEventAgent_2016-04-14-190623_[redacted].cra sh

Nov 26, 2015, 04:34:41 AM Self test - passed

Nov 26, 2015, 04:25:35 AM /Library/Logs/DiagnosticReports/UserEventAgent_2015-11-26-042535_[redacted].cra sh

Nov 25, 2015, 11:54:22 PM /Library/Logs/DiagnosticReports/firefox_2015-11-25-235422_[redacted].hang

Nov 25, 2015, 11:53:47 PM /Library/Logs/DiagnosticReports/Google Earth_2015-11-25-235347_[redacted].hang

Nov 25, 2015, 12:09:23 AM /Library/Logs/DiagnosticReports/firefox_2015-11-25-000923_[redacted].hang

Nov 23, 2015, 05:08:13 PM /Library/Logs/DiagnosticReports/Finder_2015-11-23-170813_[redacted].hang

Nov 23, 2015, 05:06:02 PM /Library/Logs/DiagnosticReports/firefox_2015-11-23-170602_[redacted].hang