MacBook Pro keeps shutting down randomly

My MacBook Pro keeps shutting down randomly. I'll be in the middle of something-- not even something intensive. Maybe just typing in a word document. And my laptop will show a warning sign saying it has to shut down.

Here's the last report that I got:

Interval Since Last Panic Report: 319576 sec

Panics Since Last Report: 2

Anonymous UUID: 19974AD3-7130-D244-8A82-C30515E297A8

Sun Jul 14 13:28:28 2013

panic(cpu 1 caller 0xffffff8025e2e426): "thread_invoke: preemption_level 1, possible cause: blocking while holding a spinlock, or within interrupt context"@/SourceCache/xnu/xnu-2050.24.15/osfmk/kern/sched_prim.c:2076

Backtrace (CPU 1), Frame : Return Address

0xffffff8115ffb920 : 0xffffff8025e1d626

0xffffff8115ffb990 : 0xffffff8025e2e426

0xffffff8115ffba10 : 0xffffff8025e2db8c

0xffffff8115ffba50 : 0xffffff8025e2664e

0xffffff8115ffba80 : 0xffffff8025e43f52

0xffffff8115ffbb60 : 0xffffff8025e2463d

0xffffff8115ffbb90 : 0xffffff8025e24cb9

0xffffff8115ffbbc0 : 0xffffff7fa7a36017

0xffffff8115ffbbe0 : 0xffffff7fa7a3adfc

0xffffff8115ffbc00 : 0xffffff7fa7a3ae73

0xffffff8115ffbc30 : 0xffffff7fa7a3b582

0xffffff8115ffbcf0 : 0xffffff7fa7a3b6a9

0xffffff8115ffbd50 : 0xffffff7fa7a3b784

0xffffff8115ffbd90 : 0xffffff7fa7a38ad4

0xffffff8115ffbe00 : 0xffffff8026151555

0xffffff8115ffbe50 : 0xffffff802619a122

0xffffff8115ffbf00 : 0xffffff80261a1562

0xffffff8115ffbf60 : 0xffffff80261e13b3

0xffffff8115ffbfb0 : 0xffffff8025ece6ad

Kernel Extensions in backtrace:

com.cisco.kext.acsock(1.0d1)[8175236E-1290-0FE0-8A6C-F3173E4498A5]@0xffffff7fa7 a35000->0xffffff7fa7a3efff

BSD process name corresponding to current thread: acwebsecagent

Mac OS version:

12E55

Kernel version:

Darwin Kernel Version 12.4.0: Wed May 1 17:57:12 PDT 2013; root:xnu-2050.24.15~1/RELEASE_X86_64

Kernel UUID: 896CB1E3-AB79-3DF1-B595-549DFFDF3D36

Kernel slide: 0x0000000025c00000

Kernel text base: 0xffffff8025e00000

System model name: MacBookPro8,1 (Mac-94245B3640C91C81)

System uptime in nanoseconds: 6984906468982

last loaded kext at 8590696964: com.cisco.kext.acsock 1.0.0d1 (addr 0xffffff7fa7a35000, size 65536)

last unloaded kext at 109798635280: com.apple.driver.AppleUSBUHCI 5.2.5 (addr 0xffffff7fa6799000, size 65536)

loaded kexts:

com.cisco.kext.acsock 1.0.0d1

com.manycamllc.driver.ManyCamDriver 0.0.9

com.Apogee.driver.DuetFWOverideDriver 1.4.4

com.apple.driver.AudioAUUC 1.60

com.apple.driver.AppleHWSensor 1.9.5d0

com.apple.filesystems.autofs 3.0

com.apple.iokit.IOBluetoothSerialManager 4.1.4f2

com.apple.driver.AGPM 100.12.87

com.apple.driver.AppleMikeyHIDDriver 122

com.apple.driver.AppleHDA 2.3.7fc4

com.apple.driver.AppleMikeyDriver 2.3.7fc4

com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0

com.apple.iokit.IOUserEthernet 1.0.0d1

com.apple.Dont_Steal_Mac_OS_X 7.0.0

com.apple.driver.ApplePolicyControl 3.4.5

com.apple.driver.AppleLPC 1.6.0

com.apple.driver.AppleBacklight 170.2.5

com.apple.driver.AppleUpstreamUserClient 3.5.10

com.apple.driver.AppleMCCSControl 1.1.11

com.apple.driver.AppleIntelHD3000Graphics 8.1.2

com.apple.driver.AppleIntelSNBGraphicsFB 8.1.2

com.apple.driver.AppleSMCPDRC 1.0.0

com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport 4.1.4f2

com.apple.driver.AppleSMCLMU 2.0.3d0

com.apple.driver.SMCMotionSensor 3.0.3d1

com.apple.driver.AppleUSBTCButtons 237.1

com.apple.driver.AppleUSBTCKeyboard 237.1

com.apple.driver.AppleIRController 320.15

com.apple.iokit.SCSITaskUserClient 3.5.5

com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1

com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1

com.apple.BootCache 34

com.apple.driver.XsanFilter 404

com.apple.iokit.IOAHCIBlockStorage 2.3.1

com.apple.driver.AppleUSBHub 5.5.5

com.apple.driver.AppleSDXC 1.4.2

com.apple.iokit.AppleBCM5701Ethernet 3.6.1b4

com.apple.driver.AirPort.Brcm4331 615.20.17

com.apple.driver.AppleUSBEHCI 5.5.0

com.apple.driver.AppleFWOHCI 4.9.6

com.apple.driver.AppleAHCIPort 2.5.2

com.apple.driver.AppleEFINVRAM 1.7

com.apple.driver.AppleSmartBatteryManager 161.0.0

com.apple.driver.AppleACPIButtons 1.7

com.apple.driver.AppleRTC 1.5

com.apple.driver.AppleHPET 1.8

com.apple.driver.AppleSMBIOS 1.9

com.apple.driver.AppleACPIEC 1.7

com.apple.driver.AppleAPIC 1.6

com.apple.driver.AppleIntelCPUPowerManagementClient 196.0.0

com.apple.nke.applicationfirewall 4.0.39

com.apple.security.quarantine 2.1

com.apple.driver.AppleIntelCPUPowerManagement 196.0.0

com.apple.kext.triggers 1.0

com.apple.iokit.IOSerialFamily 10.0.6

com.apple.driver.DspFuncLib 2.3.7fc4

com.apple.iokit.IOAudioFamily 1.8.9fc11

com.apple.kext.OSvKernDSPLib 1.6

com.apple.driver.IOPlatformPluginLegacy 1.0.0

com.apple.iokit.IOSurface 86.0.4

com.apple.iokit.IOBluetoothFamily 4.1.4f2

com.apple.driver.AppleHDAController 2.3.7fc4

com.apple.iokit.IOHDAFamily 2.3.7fc4

com.apple.driver.AppleSMBusPCI 1.0.11d0

com.apple.driver.AppleSMBusController 1.0.11d0

com.apple.iokit.IOFireWireIP 2.2.5

com.apple.driver.IOPlatformPluginFamily 5.3.0d51

com.apple.iokit.AppleBluetoothHCIControllerUSBTransport 4.1.4f2

com.apple.driver.AppleGraphicsControl 3.4.5

com.apple.driver.AppleBacklightExpert 1.0.4

com.apple.iokit.IONDRVSupport 2.3.7

com.apple.iokit.IOGraphicsFamily 2.3.7

com.apple.driver.AppleSMC 3.1.4d2

com.apple.driver.AppleThunderboltDPInAdapter 1.8.9

com.apple.driver.AppleThunderboltDPAdapterFamily 1.8.9

com.apple.driver.AppleThunderboltPCIDownAdapter 1.2.6

com.apple.driver.AppleUSBMultitouch 237.3

com.apple.iokit.IOUSBHIDDriver 5.2.5

com.apple.driver.AppleUSBMergeNub 5.5.5

com.apple.driver.AppleUSBComposite 5.2.5

com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.5.5

com.apple.iokit.IOBDStorageFamily 1.7

com.apple.iokit.IODVDStorageFamily 1.7.1

com.apple.iokit.IOCDStorageFamily 1.7.1

com.apple.iokit.IOAHCISerialATAPI 2.5.1

com.apple.iokit.IOSCSIArchitectureModelFamily 3.5.5

com.apple.iokit.IOUSBUserClient 5.5.5

com.apple.driver.AppleThunderboltNHI 1.7.8

com.apple.iokit.IOThunderboltFamily 2.4.0

com.apple.iokit.IOEthernetAVBController 1.0.2b1

com.apple.iokit.IO80211Family 530.4

com.apple.iokit.IONetworkingFamily 3.0

com.apple.iokit.IOFireWireFamily 4.5.5

com.apple.iokit.IOAHCIFamily 2.3.1

com.apple.iokit.IOUSBFamily 5.6.0

com.apple.driver.AppleEFIRuntime 1.7

com.apple.iokit.IOHIDFamily 1.8.1

com.apple.iokit.IOSMBusFamily 1.1

com.apple.security.sandbox 220.3

com.apple.kext.AppleMatch 1.0.0d1

com.apple.security.TMSafetyNet 7

com.apple.driver.DiskImages 345

com.apple.iokit.IOStorageFamily 1.8

com.apple.driver.AppleKeyStore 28.21

com.apple.driver.AppleACPIPlatform 1.7

com.apple.iokit.IOPCIFamily 2.7.3

com.apple.iokit.IOACPIFamily 1.4

com.apple.kec.corecrypto 1.0

Model: MacBookPro8,1, BootROM MBP81.0047.B27, 2 processors, Intel Core i7, 2.7 GHz, 8 GB, SMC 1.68f99

Graphics: Intel HD Graphics 3000, Intel HD Graphics 3000, Built-In, 512 MB

Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1333 MHz, 0x80AD, 0x484D54333531533642465238432D48392020

Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1333 MHz, 0x80AD, 0x484D54333531533642465238432D48392020

AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xD6), Broadcom BCM43xx 1.0 (5.106.98.100.17)

Bluetooth: Version 4.1.4f2 12041, 2 service, 11 devices, 1 incoming serial ports

Network Service: Wi-Fi, AirPort, en1

Serial ATA Device: APPLE SSD TS512C, 500.28 GB

Serial ATA Device: OPTIARC DVD RW AD-5970H

USB Device: hub_device, 0x0424 (SMSC), 0x2513, 0xfa100000 / 3

USB Device: BRCM2070 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000 / 5

USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x821a, 0xfa113000 / 7

USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0252, 0xfa120000 / 4

USB Device: FaceTime HD Camera (Built-in), apple_vendor_id, 0x8509, 0xfa200000 / 2

USB Device: hub_device, 0x0424 (SMSC), 0x2513, 0xfd100000 / 2

USB Device: IR Receiver, apple_vendor_id, 0x8242, 0xfd110000 / 3