13" Macbook Air - Mid 2013 keeps crashing randomly

My 13" Macbook Air - Mid 2013 started crashing randomly since morning. It has crashed atleast 8 times since the last 3 hours. The computer is not hot and no CPU load was there when it crashed. I was only browsing a couple of websites with single or a couple tabs open. No other apps/processes were activate by me apart from the usual background stuff. I tried disabling Spotlight using the terminal assuming it to be overloading the CPU but even that didn't work Any help would be much appreciated.

I am providing the latest etrecheck results below,

EtreCheck version: 2.9.12 (265)

Report generated 2016-06-28 19:34:45

Download EtreCheck from https://etrecheck.com

Runtime 1:43

Performance: Excellent

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

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

Click the [Check files] link for help with unknown files.

Problem: No problem - just checking

Description:

Computer keeps crashing randomly 2-3 times every hour even when just browsing with a single tab opened in safari.

Hardware Information: ⓘ

MacBook Air (13-inch, Mid 2013)

[Technical Specifications] - [User Guide] - [Warranty & Service]

MacBook Air - model: MacBookAir6,2

1 1.3 GHz Intel Core i5 CPU: 2-core

4 GB RAM Not 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: en0: 802.11 a/b/g/n/ac

Battery: Health = Normal - Cycle count = 585

Video Information: ⓘ

Intel HD Graphics 5000

Color LCD 1440 x 900

System Software: ⓘ

OS X El Capitan 10.11.5 (15F34) - Time since boot: less than an hour

Disk Information: ⓘ

APPLE SSD SD0128F disk0 : (121.33 GB) (Solid State - TRIM: Yes)

EFI (disk0s1) <not mounted> : 210 MB

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

Macintosh HD (disk1) / : 120.11 GB (34.40 GB free)

Encrypted AES-XTS Unlocked

Core Storage: disk0s2 120.47 GB Online

USB Information: ⓘ

Apple Inc. BRCM20702 Hub

Apple Inc. Bluetooth USB Host Controller

Thunderbolt Information: ⓘ

Apple Inc. thunderbolt_bus

Configuration files: ⓘ

/etc/hosts - Count: 2

Gatekeeper: ⓘ

Mac App Store and identified developers

Unknown Files: ⓘ

~/Library/LaunchAgents/com.ciscodrm.vgconnect.plist

sh -c $HOME/Library/NDSPCShowServer.CiscoDRM/NDSPCShowServer.CiscoDRM.bundle/Contents /Resources/launch.sh

~/Library/LaunchAgents/com.ciscodrm.vgconnect.uninstall.plist

sh -c /tmp/vgconnect.CiscoDRM/condUninstall.sh

~/Library/LaunchAgents/com.tatasky.tataskymobile.plist

~/Library/UninstallTataSkyMobile.sh

3 unknown files found. [Check files]

Kernel Extensions: ⓘ

/Library/Extensions

[not loaded] com.mbbecm.driver.MBBDataCardEcmDriver (5.00.00.00 - SDK 10.8 - 2016-06-03) [Support]

/Library/Extensions/MBBDataCardECMDriver_10_9.kext/Contents/PlugIns

[not loaded] com.mbbApp.driver.MBBAppUSBCDCECMControl (4.2.1 - SDK 10.8 - 2014-10-29) [Support]

[not loaded] com.mbbApp.driver.MBBAppUSBCDCECMData (4.2.1 - SDK 10.8 - 2014-10-29) [Support]

/System/Library/Extensions

[not loaded] com.ZTE.driver.ZTEUSBCDCACMData (ZTEDriver_MacV1.3.27 - 2016-06-03) [Support]

[not loaded] com.ZTE.driver.ZTEUSBMassStorageFilter (ZTEDriver_MacV1.3.27 - 2016-06-03) [Support]

[not loaded] com.zte.driver.cdc_ecm_qmi (1.0.19 - 2016-06-03) [Support]

[not loaded] com.zte.driver.cdc_usb_bus (1.0.19 - 2016-06-03) [Support]

System Launch Agents: ⓘ

[not loaded] 7 Apple tasks

[loaded] 152 Apple tasks

[running] 79 Apple tasks

System Launch Daemons: ⓘ

[not loaded] 44 Apple tasks

[loaded] 161 Apple tasks

[running] 86 Apple tasks

Launch Agents: ⓘ

[not loaded] com.adobe.AAM.Updater-1.0.plist (2014-12-25) [Support]

[loaded] com.google.keystone.agent.plist (2016-03-03) [Support]

[loaded] com.oracle.java.Java-Updater.plist (2013-12-19) [Support]

Launch Daemons: ⓘ

[loaded] com.adobe.fpsaud.plist (2016-06-14) [Support]

[loaded] com.google.keystone.daemon.plist (2016-03-03) [Support]

[loaded] com.malwarebytes.MBAMHelperTool.plist (2016-03-07) [Support]

[loaded] com.microsoft.office.licensing.helper.plist (2013-09-13) [Support]

[loaded] com.oracle.java.Helper-Tool.plist (2013-12-19) [Support]

[loaded] com.tunnelbear.mac.tbeard.plist (2015-06-06) [Support]

[not loaded] org.eyebeam.SelfControl.plist (2016-04-14) [Support]

User Launch Agents: ⓘ

[running] com.ciscodrm.vgconnect.plist (2014-12-10) [Support]

[loaded] com.ciscodrm.vgconnect.uninstall.plist (2016-06-10) [Support]

[loaded] com.tatasky.tataskymobile.plist (2016-06-10) [Support]

User Login Items: ⓘ

Flux Application (/Applications/Flux.app)

Google Drive Application (/Applications/Google Drive.app)

Caffeine Application (/Applications/Caffeine.app)

TunnelBear Application (/Applications/TunnelBear.app)

Other Apps: ⓘ

[running] com.etresoft.EtreCheck.67232

[running] com.google.GoogleDrive.23712

[running] com.lightheadsw.caffeine.22112

[running] com.microsoft.OneDrive-mac.29472

[loaded] com.microsoft.OneDriveLauncher

[running] com.tunnelbear.mac.TunnelBear.31712

[running] org.herf.Flux.23392

[loaded] 398 Apple tasks

[running] 192 Apple tasks

Internet Plug-ins: ⓘ

AdobeAAMDetect: AdobeAAMDetect 1.0.0.0 - SDK 10.6 (2012-08-09) [Support]

FlashPlayer-10.6: 22.0.0.192 - SDK 10.9 (2016-06-17) [Support]

QuickTime Plugin: 7.7.3 (2016-05-18)

AdobePDFViewerNPAPI: 11.0.03 - SDK 10.6 (2015-04-23) [Support]

AdobePDFViewer: 11.0.03 - SDK 10.6 (2015-04-23) [Support]

Flash Player: 22.0.0.192 - SDK 10.9 (2016-06-17) [Support]

Default Browser: 601 - SDK 10.11 (2016-05-18)

SharePointBrowserPlugin: 14.3.9 - SDK 10.6 (2013-11-22) [Support]

PepperFlashPlayer: 22.0.0.192 - SDK 10.6 (2016-06-17) [Support]

JavaAppletPlugin: Java 8 Update 91 build 14 (2016-04-22) Check version

Safari Extensions: ⓘ

Adguard AdBlocker - adguard - http://adguard.com (2016-06-02)

Reddit Enhancement Suite - Steve Sobel - http://redditenhancementsuite.com/ (2016-02-02)

3rd Party Preference Panes: ⓘ

Flash Player (2016-06-14) [Support]

Java (2016-04-22) [Support]

Time Machine: ⓘ

Time Machine not configured!

Top Processes by CPU: ⓘ

11% kernel_task

3% WindowServer

2% com.apple.WebKit.WebContent

2% fontd

2% com.apple.WebKit.Networking

Top Processes by Memory: ⓘ

533 MB kernel_task

520 MB Safari

201 MB mdworker(11)

193 MB com.apple.WebKit.WebContent

164 MB Google Drive

Virtual Memory Information: ⓘ

203 MB Free RAM

3.80 GB Used RAM (1.06 GB Cached)

0 B Swap Used

Diagnostics Information: ⓘ

Jun 28, 2016, 07:30:09 PM Self test - passed

Jun 28, 2016, 10:28:41 AM /Library/Logs/DiagnosticReports/com.apple.WebKit.WebContent_2016-06-28-102841_[ redacted].cpu_resource.diag [Details]

/System/Library/Frameworks/WebKit.framework/Versions/A/XPCServices/com.apple.We bKit.WebContent.xpc/Contents/MacOS/com.apple.WebKit.WebContent

Jun 27, 2016, 04:42:27 PM ~/Library/Logs/DiagnosticReports/usernoted_2016-06-27-164227_[redacted].crash

/usr/sbin/usernoted