Mac Book Pro i7 - Logging off on its own, night time, power down sleep

Hi Everyone,
I have had my Macbook pro for around 4 months now.
And I have had this problem from the beginning.
At night, often when I leave my machine, with software open and things active.
I come back in the morning to find my mac logged off and at the login screen.
Can anyone suggest what would be causing this?
I have MAC OSX 10.6.7
8GB of DDR3 RAM
2.8 GHZ Core i7 Processor
I have tried SMC resets and it doesnt seem to work.
Any ideas of why my mac book pro might be logging off on its own would be great!
Thank you.

Try trashing these 3 .plist preferences and reboot. Reset your Energy Saver preferences.
HD > Library > Preferences > SystemConfiguration > com.apple.AutoWake.plist & com.apple.PowerManagement.plist
User > Library > Preferences > com.apple.systemuiserver.plist
17" 2.2GHz i7 Quad-Core MacBook Pro  8G RAM  750G + 120G OCZ Vertex 3 SSD Boot HD 

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Anonymous UUID:       5F11BBED-B359-97ED-A6E6-DABCA5B8CD30
Mon Sep 29 12:06:53 2014
panic(cpu 2 caller 0xffffff80026dc43e): Kernel trap at 0xffffff7f831d987c, type 14=page fault, registers:
CR0: 0x000000008001003b, CR2: 0x000038250c8b4885, CR3: 0x0000000004ac4000, CR4: 0x00000000000606e0
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R12: 0xffffff80026f3a10, R13: 0x0000000000000033, R14: 0x0000000000000000, R15: 0x000000000000000a
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0xffffff809c04b970 : 0xffffff80026dc43e
0xffffff809c04bb40 : 0xffffff80026f3976
0xffffff809c04bb60 : 0xffffff7f831d987c
0xffffff809c04bca0 : 0xffffff7f831d70fe
0xffffff809c04bd00 : 0xffffff7f8445b3a5
0xffffff809c04bd70 : 0xffffff7f831de1b5
0xffffff809c04bdf0 : 0xffffff7f831e11d9
0xffffff809c04be70 : 0xffffff7f831e0660
0xffffff809c04bec0 : 0xffffff7f831dfbc5
0xffffff809c04bf00 : 0xffffff7f831ddf08
0xffffff809c04bf20 : 0xffffff800264a20a
0xffffff809c04bfb0 : 0xffffff80026d7607
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         com.apple.iokit.IOHIDFamily(2.0)[56DC13A6-5EE7-3089-9449-D5E3A8186C90]@0xffffff 7f831b4000->0xffffff7f83225fff
            dependency: com.apple.driver.AppleFDEKeyStore(28.30)[2A8A5F6B-0A7C-33A0-8E5B-4C10F646EC4F]@ 0xffffff7f831a9000
         com.spsys.driver.EIOKitDriver(1.0.1)[00000000-0000-0000-0000-000000000000]@0xff ffff7f8445a000->0xffffff7f8445dfff
            dependency: com.apple.iokit.IOHIDFamily(2.0.0)[56DC13A6-5EE7-3089-9449-D5E3A8186C90]@0xffff ff7f831b4000
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13F34
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Darwin Kernel Version 13.4.0: Sun Aug 17 19:50:11 PDT 2014; root:xnu-2422.115.4~1/RELEASE_X86_64
Kernel UUID: 9477416E-7BCA-3679-AF97-E1EAAD3DD5A0
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last unloaded kext at 34280731335715: com.apple.driver.AppleUSBCDC 4.2.1b5 (addr 0xffffff7f8445e000, size 16384)
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com.spsys.driver.EIOKitDriver 1.0.1
com.spsys.driver.ENKEDriver 1
com.apple.driver.AudioAUUC 1.60
com.apple.driver.AppleHWSensor 1.9.5d0
com.apple.driver.AGPM 100.14.34
com.apple.filesystems.autofs 3.0
com.apple.iokit.IOBluetoothSerialManager 4.2.7f3
com.apple.driver.AppleMikeyHIDDriver 124
com.apple.driver.AppleHDA 2.6.3f4
com.apple.driver.AppleMikeyDriver 2.6.3f4
com.apple.iokit.IOUserEthernet 1.0.0d1
com.apple.driver.AppleSMCLMU 2.0.4d1
com.apple.driver.ApplePolicyControl 3.6.22
com.apple.driver.AppleUpstreamUserClient 3.5.13
com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0
com.apple.driver.AppleLPC 1.7.0
com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport 4.2.7f3
com.apple.Dont_Steal_Mac_OS_X 7.0.0
com.apple.driver.AppleHWAccess 1
com.apple.driver.AppleThunderboltIP 1.1.2
com.apple.driver.AppleSMCPDRC 1.0.0
com.apple.driver.AppleBacklight 170.4.11
com.apple.driver.AppleMCCSControl 1.2.5
com.apple.driver.AppleIntelHD3000Graphics 8.2.4
com.apple.driver.AppleIntelSNBGraphicsFB 8.2.4
com.apple.driver.SMCMotionSensor 3.0.4d1
com.apple.driver.AppleUSBTCButtons 240.2
com.apple.driver.AppleUSBTCKeyboard 240.2
com.apple.driver.AppleIRController 325.7
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeLZVN 1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.BootCache 35
com.apple.iokit.SCSITaskUserClient 3.6.7
com.apple.driver.XsanFilter 404
com.apple.iokit.IOAHCIBlockStorage 2.6.0
com.apple.driver.AppleUSBHub 683.4.0
com.apple.driver.AirPort.Brcm4331 700.20.22
com.apple.iokit.AppleBCM5701Ethernet 3.8.1b2
com.apple.driver.AppleSDXC 1.5.2
com.apple.driver.AppleAHCIPort 3.0.5
com.apple.driver.AppleFWOHCI 5.0.2
com.apple.driver.AppleUSBEHCI 660.4.0
com.apple.driver.AppleSmartBatteryManager 161.0.0
com.apple.driver.AppleACPIButtons 2.0
com.apple.driver.AppleRTC 2.0
com.apple.driver.AppleHPET 1.8
com.apple.driver.AppleSMBIOS 2.1
com.apple.driver.AppleACPIEC 2.0
com.apple.driver.AppleAPIC 1.7
com.apple.driver.AppleIntelCPUPowerManagementClient 217.92.1
com.apple.nke.applicationfirewall 153
com.apple.security.quarantine 3
com.apple.driver.AppleIntelCPUPowerManagement 217.92.1
com.apple.AppleGraphicsDeviceControl 3.6.22
com.apple.kext.triggers 1.0
com.apple.iokit.IOSerialFamily 10.0.7
com.apple.driver.DspFuncLib 2.6.3f4
com.apple.vecLib.kext 1.0.0
com.apple.iokit.IOAudioFamily 1.9.7fc2
com.apple.kext.OSvKernDSPLib 1.14
com.apple.iokit.IOSurface 91.1
com.apple.driver.AppleHDAController 2.6.3f4
com.apple.iokit.IOHDAFamily 2.6.3f4
com.apple.driver.IOPlatformPluginLegacy 1.0.0
com.apple.driver.AppleSMBusPCI 1.0.12d1
com.apple.iokit.IOBluetoothHostControllerUSBTransport 4.2.7f3
com.apple.iokit.IOFireWireIP 2.2.6
com.apple.iokit.IOBluetoothFamily 4.2.7f3
com.apple.driver.IOPlatformPluginFamily 5.7.1d6
com.apple.driver.AppleGraphicsControl 3.6.22
com.apple.driver.AppleBacklightExpert 1.0.4
com.apple.driver.AppleSMBusController 1.0.12d1
com.apple.iokit.IONDRVSupport 2.4.1
com.apple.iokit.IOGraphicsFamily 2.4.1
com.apple.driver.AppleSMC 3.1.8
com.apple.driver.AppleThunderboltDPInAdapter 3.1.7
com.apple.driver.AppleThunderboltDPAdapterFamily 3.1.7
com.apple.driver.AppleThunderboltPCIDownAdapter 1.4.5
com.apple.driver.AppleUSBMultitouch 240.10
com.apple.iokit.IOUSBHIDDriver 660.4.0
com.apple.driver.AppleUSBMergeNub 650.4.0
com.apple.driver.AppleUSBComposite 656.4.1
com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.6.7
com.apple.iokit.IOBDStorageFamily 1.7
com.apple.iokit.IODVDStorageFamily 1.7.1
com.apple.iokit.IOCDStorageFamily 1.7.1
com.apple.driver.AppleThunderboltNHI 2.0.1
com.apple.iokit.IOThunderboltFamily 3.3.1
com.apple.iokit.IOAHCISerialATAPI 2.6.1
com.apple.iokit.IOSCSIArchitectureModelFamily 3.6.7
com.apple.iokit.IO80211Family 640.36
com.apple.iokit.IOEthernetAVBController 1.0.3b4
com.apple.driver.mDNSOffloadUserClient 1.0.1b5
com.apple.iokit.IONetworkingFamily 3.2
com.apple.iokit.IOUSBUserClient 660.4.2
com.apple.iokit.IOAHCIFamily 2.6.5
com.apple.iokit.IOFireWireFamily 4.5.5
com.apple.iokit.IOUSBFamily 686.4.1
com.apple.driver.AppleEFINVRAM 2.0
com.apple.driver.AppleEFIRuntime 2.0
com.apple.iokit.IOHIDFamily 2.0.0
com.apple.iokit.IOSMBusFamily 1.1
com.apple.security.sandbox 278.11.1
com.apple.kext.AppleMatch 1.0.0d1
com.apple.security.TMSafetyNet 7
com.apple.driver.AppleKeyStore 2
com.apple.driver.DiskImages 371.1
com.apple.iokit.IOStorageFamily 1.9
com.apple.iokit.IOReportFamily 23
com.apple.driver.AppleFDEKeyStore 28.30
com.apple.driver.AppleACPIPlatform 2.0
com.apple.iokit.IOPCIFamily 2.9
com.apple.iokit.IOACPIFamily 1.4
com.apple.kec.corecrypto 1.0
com.apple.kec.pthread 1
Model: MacBookPro8,1, BootROM MBP81.0047.B27, 2 processors, Intel Core i5, 2.3 GHz, 4 GB, SMC 1.68f99
Graphics: Intel HD Graphics 3000, Intel HD Graphics 3000, Built-In, 384 MB
Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1333 MHz, 0x80CE, 0x4D34373142353737334448302D4348392020
Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1333 MHz, 0x80CE, 0x4D34373142353737334448302D4348392020
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xD6), Broadcom BCM43xx 1.0 (5.106.98.100.22)
Bluetooth: Version 4.2.7f3 14616, 3 services, 23 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en1
Serial ATA Device: TOSHIBA MK3265GSXF, 320.07 GB
Serial ATA Device: MATSHITADVD-R   UJ-8A8
USB Device: Hub
USB Device: IR Receiver
USB Device: FaceTime HD Camera (Built-in)
USB Device: Hub
USB Device: Apple Internal Keyboard / Trackpad
USB Device: BRCM2070 Hub
USB Device: Bluetooth USB Host Controller
Thunderbolt Bus: MacBook Pro, Apple Inc., 22.1

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When you restart after the installation, you'll be prompted to go through the initial setup process for a new computer. That’s when you transfer the data from a backup in Setup Assistant.
Select only users in the Setup Assistant dialog—not Applications, Other files and folders, or Computer & Network Settings. Don't transfer the Guest account, if it was enabled.
Reinstall third-party software from original media or fresh downloads—not from a backup, which may be contaminated.
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Step 1
The first step in dealing with a boot failure is to secure your data. If you want to preserve the contents of the startup drive, and you don't already have at least one current backup, you must try to back up now, before you do anything else. It may or may not be possible. If you don't care about the data that has changed since your last backup, you can skip this step.
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b. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, boot the non-working Mac in target disk mode. Use the working Mac to copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
c. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.
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Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to boot, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can boot now, one of the devices you disconnected, or a combination of them, is causing the problem. Finding out which one is a process of elimination.
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Boot in safe mode. Note: If FileVault is enabled, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Post for further instructions.
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including wireless networking on certain Macs.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
When you boot in safe mode, it's normal to see a dark gray progress bar on a light gray background. If the progress bar gets stuck for more than a few minutes, or if the system shuts down automatically while the progress bar is displayed, your boot volume is corrupt and the drive is probably malfunctioning. In that case, go to Step 5.
If you can boot and log in now, empty the Trash, and then open the Finder Info window on your boot volume ("Macintosh HD," unless you gave it a different name.) Check that you have at least 9 GB of available space, as shown in the window. If you don't, copy as many files as necessary to another volume (not another folder on the same volume) and delete the originals. Deletion isn't complete until you empty the Trash again. Do this until the available space is more than 9 GB. Then reboot as usual (i.e., not in safe mode.)
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Sometimes a boot failure can be resolved by resetting the NVRAM.
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This is one of the rare situations in which you should also run Repair Permissions, ignoring the false warnings it may produce. Look for the line "Permissions repair complete" at the end of the output. Then reboot as usual.
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Reinstall the OS. If your Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.
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Repeat step 6, but this time erase the boot volume in Disk Utility before installing. The system should automatically reboot into the Setup Assistant. Follow the prompts to transfer your data from a Time Machine or other backup.
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Mac Book Pro i7 - Logging off on its own, night time, power down sleep

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