imac 20 inch aio crashing

my iMac keep randomly crashing. starting it back up seems to be an issue as well. I've never had an iMac before, this is all so new to me. HELP!?

Problem description:

crashing randomly

EtreCheck version: 2.2 (132)

Report generated 7/3/15, 2:16 PM

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Hardware Information: ℹ️

iMac (20-inch, Mid 2007) (Verified)

iMac - model: iMac7,1

1 2.4 GHz Intel Core 2 Duo CPU: 2-core

2 GB RAM Upgradeable

BANK 0/DIMM0

1 GB DDR2 SDRAM 667 MHz ok

BANK 1/DIMM1

1 GB DDR2 SDRAM 667 MHz ok

Bluetooth: Old - Handoff/Airdrop2 not supported

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

Video Information: ℹ️

ATI,RadeonHD2600 - VRAM: 256 MB

iMac 1680 x 1050

System Software: ℹ️

OS X 10.9.5 (13F34) - Time since boot: 0:4:46

Disk Information: ℹ️

WDC WD3200AAJS-40RYA0 disk0 : (320.07 GB)

EFI (disk0s1) /Volumes/firmwaresyncd.lxGEk4 : 210 MB (205 MB free)

iMac (disk0s2) / : 319.21 GB (294.53 GB free)

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

USB Information: ℹ️

Apple, Inc. Keyboard Hub

Apple, Inc Apple Keyboard

Apple Inc. Built-in iSight

Apple Inc. Bluetooth USB Host Controller

Mitsumi Electric Apple Optical USB Mouse

Apple Computer, Inc. IR Receiver

Gatekeeper: ℹ️

Mac App Store and identified developers

Launch Agents: ℹ️

[running] com.teamviewer.teamviewer.plist [Click for support]

[running] com.teamviewer.teamviewer_desktop.plist [Click for support]

Launch Daemons: ℹ️

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

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

[loaded] com.teamviewer.Helper.plist [Click for support]

[running] com.teamviewer.teamviewer_service.plist [Click for support]

User Login Items: ℹ️

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

Internet Plug-ins: ℹ️

SharePointBrowserPlugin: Version: 14.0.0 [Click for support]

FlashPlayer-10.6: Version: 18.0.0.194 - SDK 10.6 [Click for support]

Flash Player: Version: 18.0.0.194 - SDK 10.6 [Click for support]

iPhotoPhotocast: Version: 7.0

QuickTime Plugin: Version: 7.7.3

Default Browser: Version: 537 - SDK 10.9

3rd Party Preference Panes: ℹ️

Flash Player [Click for support]

Time Machine: ℹ️

Time Machine not configured!

Top Processes by CPU: ℹ️

3% WindowServer

1% fontd

0% aosnotifyd

Top Processes by Memory: ℹ️

253 MB kernel_task

150 MB Messages

102 MB com.apple.WebKit.WebContent

78 MB Safari

76 MB CVMCompiler(4)

Virtual Memory Information: ℹ️

103 MB Free RAM

1.90 GB Used RAM

0 B Swap Used

Diagnostics Information: ℹ️

Jul 3, 2015, 02:10:43 PM Self test - passed

Jul 1, 2015, 05:23:17 PM /Users/[redacted]/Library/Logs/DiagnosticReports/Microsoft Word_2015-07-01-172317_[redacted].crash

Jul 1, 2015, 01:47:00 PM /Library/Logs/DiagnosticReports/mds_2015-07-01-134700_[redacted].crash