What should I do? I just got my new MBA, and it's the fourth time, when I got a kernel panic. It happends when I don't use my computer for a while, suddenly, when I try to put it back on it shows me "Your computer had to reboot" or something like that. Here's the log, HELP ME! 

panic(cpu 2 caller 0xffffff80002c4794): Kernel trap at 0xffffff7f816661f1, type 13=general protection, registers:
CR0: 0x000000008001003b, CR2: 0x000000010055700c, CR3: 0x0000000000100000, CR4: 0x00000000001606e0
RAX: 0xff000000ff000000, RBX: 0xffffff806a5ee000, RCX: 0x0000000000000000, RDX: 0x0000000000000000
RSP: 0xffffff807f2cbc20, RBP: 0xffffff807f2cbc30, RSI: 0x00000000ff000000, RDI: 0xffffff806a5ee000
R8: 0x0000000000000000, R9: 0xffffff800b4e5e00, R10: 0xffffff800086edd0, R11: 0xffffff80002dad00
R12: 0xffffff806a4791c8, R13: 0xffffff806a5ee000, R14: 0xffffff806a5ee000, R15: 0xffffff806a479000
RFL: 0x0000000000010282, RIP: 0xffffff7f816661f1, CS: 0x0000000000000008, SS: 0x0000000000000010
CR2: 0x000000010055700c, Error code: 0x0000000000000000, Faulting CPU: 0x2
Backtrace (CPU 2), Frame : Return Address
0xffffff807f2cb8d0 : 0xffffff8000220792
0xffffff807f2cb950 : 0xffffff80002c4794
0xffffff807f2cbb00 : 0xffffff80002da55d
0xffffff807f2cbb20 : 0xffffff7f816661f1
0xffffff807f2cbc30 : 0xffffff7f81667413
0xffffff807f2cbc70 : 0xffffff7f8165560c
0xffffff807f2cbcb0 : 0xffffff7f81654de7
0xffffff807f2cbce0 : 0xffffff7f816551bd
0xffffff807f2cbd10 : 0xffffff7f80c52832
0xffffff807f2cbd50 : 0xffffff7f816dd383
0xffffff807f2cbda0 : 0xffffff7f816df692
0xffffff807f2cbde0 : 0xffffff7f816df7c4
0xffffff807f2cbe20 : 0xffffff7f80c564c5
0xffffff807f2cbe60 : 0xffffff7f80c56628
0xffffff807f2cbe90 : 0xffffff7f80c59fd7
0xffffff807f2cbef0 : 0xffffff800063d4d6
0xffffff807f2cbf30 : 0xffffff800063c250
0xffffff807f2cbf70 : 0xffffff800063c0f4
0xffffff807f2cbfb0 : 0xffffff8000820057
Kernel Extensions in backtrace:
com.apple.iokit.IOGraphicsFamily(2.3.4)[D0A1F6BD-E66E-3DD8-9913-A3AB8746F422]@0xffffff7f80c47000->0xffffff7f80c7ffff
dependency: com.apple.iokit.IOPCIFamily(2.7)[5C23D598-58B2-3204-BC03-BC3C0F00BD32]@0xffffff7f8082b000
com.apple.driver.AppleIntelFramebufferCapri(7.3.2)[5D02E509-F60D-3312-9C3C-AF47D6622C85]@0xffffff7f816d2000->0xffffff7f8172ffff
dependency: com.apple.iokit.IOACPIFamily(1.4)[19BAB11C-CE5E-3068-AD10-132019C59D6C]@0xffffff7f80bf0000
dependency: com.apple.iokit.IOPCIFamily(2.7)[5C23D598-58B2-3204-BC03-BC3C0F00BD32]@0xffffff7f8082b000
dependency: com.apple.iokit.IOGraphicsFamily(2.3.4)[D0A1F6BD-E66E-3DD8-9913-A3AB8746F422]@0xffffff7f80c47000
com.apple.driver.AppleIntelHD4000Graphics(7.3.2)[AD64F3E5-2838-3046-A9EA-1CB6C9769436]@0xffffff7f81652000->0xffffff7f816b8fff
dependency: com.apple.iokit.IOPCIFamily(2.7)[5C23D598-58B2-3204-BC03-BC3C0F00BD32]@0xffffff7f8082b000
dependency: com.apple.iokit.IONDRVSupport(2.3.4)[7C8672C4-8B0D-3CCF-A79A-23C62E90F895]@0xffffff7f80c80000
dependency: com.apple.iokit.IOGraphicsFamily(2.3.4)[D0A1F6BD-E66E-3DD8-9913-A3AB8746F422]@0xffffff7f80c47000
BSD process name corresponding to current thread: kernel_task
Mac OS version:
11G63b
Kernel version:
Darwin Kernel Version 11.4.2: Thu Aug 23 16:25:48 PDT 2012; root:xnu-1699.32.7~1/RELEASE_X86_64
Kernel UUID: ***************************************
System model name: MacBookAir5,1
System uptime in nanoseconds: 1044382242324
last loaded kext at 5847435022: com.avast.PacketForwarder 1.3 (addr 0xffffff7f80abb000, size 20480)
last unloaded kext at 75783118152: com.apple.driver.AppleUSBTCKeyEventDriver 227.6 (addr 0xffffff7f8148c000, size 8192)
loaded kexts:
com.avast.PacketForwarder 1.3
com.avast.AvastFileShield 1.0.1
com.apple.filesystems.autofs 3.0
com.apple.driver.AGPM 100.12.75
com.apple.driver.ApplePlatformEnabler 2.0.5d3
com.apple.driver.X86PlatformShim 5.0.0d8
com.apple.driver.AppleMikeyHIDDriver 122
com.apple.driver.AppleHDA 2.2.5a5
com.apple.driver.AppleMikeyDriver 2.2.5a5
com.apple.driver.AppleUpstreamUserClient 3.5.9
com.apple.driver.AudioAUUC 1.59
com.apple.driver.AppleSMCPDRC 5.0.0d8
com.apple.iokit.IOUserEthernet 1.0.0d1
com.apple.iokit.IOBluetoothSerialManager 4.0.8f17
com.apple.Dont_Steal_Mac_OS_X 7.0.0
com.apple.driver.AppleSMCLMU 2.0.1d2
com.apple.driver.AudioIPCDriver 1.2.3
com.apple.driver.ApplePolicyControl 3.1.33
com.apple.driver.AppleLPC 1.6.0
com.apple.driver.AppleBacklight 170.2.2
com.apple.driver.AppleMCCSControl 1.0.33
com.apple.driver.AppleIntelHD4000Graphics 7.3.2
com.apple.driver.AppleIntelFramebufferCapri 7.3.2
com.apple.driver.BroadcomUSBBluetoothHCIController 4.0.8f17
com.apple.driver.AppleUSBTCButtons 227.6
com.apple.driver.AppleUSBTCKeyboard 227.6
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.BootCache 33
com.apple.driver.XsanFilter 404
com.apple.iokit.IOAHCIBlockStorage 2.1.0
com.apple.driver.AppleAHCIPort 2.3.1
com.apple.driver.AppleUSBHub 5.1.0
com.apple.driver.AirPort.Brcm4331 561.7.22
com.apple.driver.AppleEFINVRAM 1.6.1
com.apple.driver.AppleSmartBatteryManager 161.0.0
com.apple.driver.AppleUSBEHCI 5.1.0
com.apple.driver.AppleUSBXHCI 1.1.0
com.apple.driver.AppleACPIButtons 1.5
com.apple.driver.AppleRTC 1.5
com.apple.driver.AppleHPET 1.7
com.apple.driver.AppleSMBIOS 1.9
com.apple.driver.AppleACPIEC 1.5
com.apple.driver.AppleAPIC 1.6
com.apple.driver.AppleIntelCPUPowerManagementClient 195.0.0
com.apple.nke.applicationfirewall 3.2.30
com.apple.security.quarantine 1.4
com.apple.security.TMSafetyNet 8
com.apple.driver.AppleIntelCPUPowerManagement 195.0.0
com.apple.kext.triggers 1.0
com.apple.iokit.IOSCSIArchitectureModelFamily 3.2.1
com.apple.driver.DspFuncLib 2.2.5a5
com.apple.iokit.IOSurface 80.0.2
com.apple.iokit.IOSerialFamily 10.0.5
com.apple.driver.AppleHDAController 2.2.5a5
com.apple.iokit.IOHDAFamily 2.2.5a5
com.apple.iokit.IOAudioFamily 1.8.6fc18
com.apple.kext.OSvKernDSPLib 1.3
com.apple.driver.AppleSMBusPCI 1.0.10d0
com.apple.driver.X86PlatformPlugin 5.1.1d6
com.apple.driver.AppleSMC 3.1.3d10
com.apple.driver.IOPlatformPluginFamily 5.1.1d6
com.apple.driver.AppleGraphicsControl 3.1.33
com.apple.driver.AppleBacklightExpert 1.0.4
com.apple.driver.AppleSMBusController 1.0.10d0
com.apple.iokit.IONDRVSupport 2.3.4
com.apple.iokit.IOGraphicsFamily 2.3.4
com.apple.driver.AppleUSBBluetoothHCIController 4.0.8f17
com.apple.iokit.IOBluetoothFamily 4.0.8f17
com.apple.driver.AppleThunderboltDPInAdapter 1.8.5
com.apple.driver.AppleThunderboltDPAdapterFamily 1.8.5
com.apple.driver.AppleThunderboltPCIDownAdapter 1.2.5
com.apple.driver.AppleUSBMultitouch 230.5
com.apple.iokit.IOUSBHIDDriver 5.0.0
com.apple.driver.AppleUSBMergeNub 5.1.0
com.apple.driver.AppleUSBComposite 5.0.0
com.apple.driver.AppleThunderboltNHI 1.6.0
com.apple.iokit.IOThunderboltFamily 2.0.3
com.apple.iokit.IOAHCIFamily 2.0.8
com.apple.iokit.IO80211Family 420.3
com.apple.iokit.IONetworkingFamily 2.1
com.apple.iokit.IOUSBUserClient 5.0.0
com.apple.iokit.IOUSBFamily 5.1.0
com.apple.driver.AppleEFIRuntime 1.6.1
com.apple.iokit.IOHIDFamily 1.7.1
com.apple.iokit.IOSMBusFamily 1.1
com.apple.security.sandbox 177.8
com.apple.kext.AppleMatch 1.0.0d1
com.apple.driver.DiskImages 331.7
com.apple.iokit.IOStorageFamily 1.7.2
com.apple.driver.AppleKeyStore 28.18
com.apple.driver.AppleACPIPlatform 1.5
com.apple.iokit.IOPCIFamily 2.7
com.apple.iokit.IOACPIFamily 1.4
Thanks a lot for any help
panic(cpu 2 caller 0xffffff80002c4794): Kernel trap at 0xffffff7f816661f1, type 13=general protection, registers:
CR0: 0x000000008001003b, CR2: 0x000000010055700c, CR3: 0x0000000000100000, CR4: 0x00000000001606e0
RAX: 0xff000000ff000000, RBX: 0xffffff806a5ee000, RCX: 0x0000000000000000, RDX: 0x0000000000000000
RSP: 0xffffff807f2cbc20, RBP: 0xffffff807f2cbc30, RSI: 0x00000000ff000000, RDI: 0xffffff806a5ee000
R8: 0x0000000000000000, R9: 0xffffff800b4e5e00, R10: 0xffffff800086edd0, R11: 0xffffff80002dad00
R12: 0xffffff806a4791c8, R13: 0xffffff806a5ee000, R14: 0xffffff806a5ee000, R15: 0xffffff806a479000
RFL: 0x0000000000010282, RIP: 0xffffff7f816661f1, CS: 0x0000000000000008, SS: 0x0000000000000010
CR2: 0x000000010055700c, Error code: 0x0000000000000000, Faulting CPU: 0x2
Backtrace (CPU 2), Frame : Return Address
0xffffff807f2cb8d0 : 0xffffff8000220792
0xffffff807f2cb950 : 0xffffff80002c4794
0xffffff807f2cbb00 : 0xffffff80002da55d
0xffffff807f2cbb20 : 0xffffff7f816661f1
0xffffff807f2cbc30 : 0xffffff7f81667413
0xffffff807f2cbc70 : 0xffffff7f8165560c
0xffffff807f2cbcb0 : 0xffffff7f81654de7
0xffffff807f2cbce0 : 0xffffff7f816551bd
0xffffff807f2cbd10 : 0xffffff7f80c52832
0xffffff807f2cbd50 : 0xffffff7f816dd383
0xffffff807f2cbda0 : 0xffffff7f816df692
0xffffff807f2cbde0 : 0xffffff7f816df7c4
0xffffff807f2cbe20 : 0xffffff7f80c564c5
0xffffff807f2cbe60 : 0xffffff7f80c56628
0xffffff807f2cbe90 : 0xffffff7f80c59fd7
0xffffff807f2cbef0 : 0xffffff800063d4d6
0xffffff807f2cbf30 : 0xffffff800063c250
0xffffff807f2cbf70 : 0xffffff800063c0f4
0xffffff807f2cbfb0 : 0xffffff8000820057
Kernel Extensions in backtrace:
com.apple.iokit.IOGraphicsFamily(2.3.4)[D0A1F6BD-E66E-3DD8-9913-A3AB8746F422]@0xffffff7f80c47000->0xffffff7f80c7ffff
dependency: com.apple.iokit.IOPCIFamily(2.7)[5C23D598-58B2-3204-BC03-BC3C0F00BD32]@0xffffff7f8082b000
com.apple.driver.AppleIntelFramebufferCapri(7.3.2)[5D02E509-F60D-3312-9C3C-AF47D6622C85]@0xffffff7f816d2000->0xffffff7f8172ffff
dependency: com.apple.iokit.IOACPIFamily(1.4)[19BAB11C-CE5E-3068-AD10-132019C59D6C]@0xffffff7f80bf0000
dependency: com.apple.iokit.IOPCIFamily(2.7)[5C23D598-58B2-3204-BC03-BC3C0F00BD32]@0xffffff7f8082b000
dependency: com.apple.iokit.IOGraphicsFamily(2.3.4)[D0A1F6BD-E66E-3DD8-9913-A3AB8746F422]@0xffffff7f80c47000
com.apple.driver.AppleIntelHD4000Graphics(7.3.2)[AD64F3E5-2838-3046-A9EA-1CB6C9769436]@0xffffff7f81652000->0xffffff7f816b8fff
dependency: com.apple.iokit.IOPCIFamily(2.7)[5C23D598-58B2-3204-BC03-BC3C0F00BD32]@0xffffff7f8082b000
dependency: com.apple.iokit.IONDRVSupport(2.3.4)[7C8672C4-8B0D-3CCF-A79A-23C62E90F895]@0xffffff7f80c80000
dependency: com.apple.iokit.IOGraphicsFamily(2.3.4)[D0A1F6BD-E66E-3DD8-9913-A3AB8746F422]@0xffffff7f80c47000
BSD process name corresponding to current thread: kernel_task
Mac OS version:
11G63b
Kernel version:
Darwin Kernel Version 11.4.2: Thu Aug 23 16:25:48 PDT 2012; root:xnu-1699.32.7~1/RELEASE_X86_64
Kernel UUID: ***************************************
System model name: MacBookAir5,1
System uptime in nanoseconds: 1044382242324
last loaded kext at 5847435022: com.avast.PacketForwarder 1.3 (addr 0xffffff7f80abb000, size 20480)
last unloaded kext at 75783118152: com.apple.driver.AppleUSBTCKeyEventDriver 227.6 (addr 0xffffff7f8148c000, size 8192)
loaded kexts:
com.avast.PacketForwarder 1.3
com.avast.AvastFileShield 1.0.1
com.apple.filesystems.autofs 3.0
com.apple.driver.AGPM 100.12.75
com.apple.driver.ApplePlatformEnabler 2.0.5d3
com.apple.driver.X86PlatformShim 5.0.0d8
com.apple.driver.AppleMikeyHIDDriver 122
com.apple.driver.AppleHDA 2.2.5a5
com.apple.driver.AppleMikeyDriver 2.2.5a5
com.apple.driver.AppleUpstreamUserClient 3.5.9
com.apple.driver.AudioAUUC 1.59
com.apple.driver.AppleSMCPDRC 5.0.0d8
com.apple.iokit.IOUserEthernet 1.0.0d1
com.apple.iokit.IOBluetoothSerialManager 4.0.8f17
com.apple.Dont_Steal_Mac_OS_X 7.0.0
com.apple.driver.AppleSMCLMU 2.0.1d2
com.apple.driver.AudioIPCDriver 1.2.3
com.apple.driver.ApplePolicyControl 3.1.33
com.apple.driver.AppleLPC 1.6.0
com.apple.driver.AppleBacklight 170.2.2
com.apple.driver.AppleMCCSControl 1.0.33
com.apple.driver.AppleIntelHD4000Graphics 7.3.2
com.apple.driver.AppleIntelFramebufferCapri 7.3.2
com.apple.driver.BroadcomUSBBluetoothHCIController 4.0.8f17
com.apple.driver.AppleUSBTCButtons 227.6
com.apple.driver.AppleUSBTCKeyboard 227.6
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.BootCache 33
com.apple.driver.XsanFilter 404
com.apple.iokit.IOAHCIBlockStorage 2.1.0
com.apple.driver.AppleAHCIPort 2.3.1
com.apple.driver.AppleUSBHub 5.1.0
com.apple.driver.AirPort.Brcm4331 561.7.22
com.apple.driver.AppleEFINVRAM 1.6.1
com.apple.driver.AppleSmartBatteryManager 161.0.0
com.apple.driver.AppleUSBEHCI 5.1.0
com.apple.driver.AppleUSBXHCI 1.1.0
com.apple.driver.AppleACPIButtons 1.5
com.apple.driver.AppleRTC 1.5
com.apple.driver.AppleHPET 1.7
com.apple.driver.AppleSMBIOS 1.9
com.apple.driver.AppleACPIEC 1.5
com.apple.driver.AppleAPIC 1.6
com.apple.driver.AppleIntelCPUPowerManagementClient 195.0.0
com.apple.nke.applicationfirewall 3.2.30
com.apple.security.quarantine 1.4
com.apple.security.TMSafetyNet 8
com.apple.driver.AppleIntelCPUPowerManagement 195.0.0
com.apple.kext.triggers 1.0
com.apple.iokit.IOSCSIArchitectureModelFamily 3.2.1
com.apple.driver.DspFuncLib 2.2.5a5
com.apple.iokit.IOSurface 80.0.2
com.apple.iokit.IOSerialFamily 10.0.5
com.apple.driver.AppleHDAController 2.2.5a5
com.apple.iokit.IOHDAFamily 2.2.5a5
com.apple.iokit.IOAudioFamily 1.8.6fc18
com.apple.kext.OSvKernDSPLib 1.3
com.apple.driver.AppleSMBusPCI 1.0.10d0
com.apple.driver.X86PlatformPlugin 5.1.1d6
com.apple.driver.AppleSMC 3.1.3d10
com.apple.driver.IOPlatformPluginFamily 5.1.1d6
com.apple.driver.AppleGraphicsControl 3.1.33
com.apple.driver.AppleBacklightExpert 1.0.4
com.apple.driver.AppleSMBusController 1.0.10d0
com.apple.iokit.IONDRVSupport 2.3.4
com.apple.iokit.IOGraphicsFamily 2.3.4
com.apple.driver.AppleUSBBluetoothHCIController 4.0.8f17
com.apple.iokit.IOBluetoothFamily 4.0.8f17
com.apple.driver.AppleThunderboltDPInAdapter 1.8.5
com.apple.driver.AppleThunderboltDPAdapterFamily 1.8.5
com.apple.driver.AppleThunderboltPCIDownAdapter 1.2.5
com.apple.driver.AppleUSBMultitouch 230.5
com.apple.iokit.IOUSBHIDDriver 5.0.0
com.apple.driver.AppleUSBMergeNub 5.1.0
com.apple.driver.AppleUSBComposite 5.0.0
com.apple.driver.AppleThunderboltNHI 1.6.0
com.apple.iokit.IOThunderboltFamily 2.0.3
com.apple.iokit.IOAHCIFamily 2.0.8
com.apple.iokit.IO80211Family 420.3
com.apple.iokit.IONetworkingFamily 2.1
com.apple.iokit.IOUSBUserClient 5.0.0
com.apple.iokit.IOUSBFamily 5.1.0
com.apple.driver.AppleEFIRuntime 1.6.1
com.apple.iokit.IOHIDFamily 1.7.1
com.apple.iokit.IOSMBusFamily 1.1
com.apple.security.sandbox 177.8
com.apple.kext.AppleMatch 1.0.0d1
com.apple.driver.DiskImages 331.7
com.apple.iokit.IOStorageFamily 1.7.2
com.apple.driver.AppleKeyStore 28.18
com.apple.driver.AppleACPIPlatform 1.5
com.apple.iokit.IOPCIFamily 2.7
com.apple.iokit.IOACPIFamily 1.4
Thanks a lot for any help