Macbook Pro (4gb DDR3, i5) - keeps crashing black screen

and freezing.. what can I do? I'm not v. tech savvy, so any help pls, break it down very simply.. it's driving me nuts.
Spent £2k on this machine a couple of years ago and now it's playing up.
Please help.

Read this link:
http://support.apple.com/kb/TS4088
Contact Apple.
Ciao.

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    I purchased this MacBook Pro early at 2011 and fully upgraded it including extended RAM.
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    Memory: 8 GB 1333 Mhz DDR3
    Running OS X Lion 10.7.5.
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    Interval Since Last Panic Report:  519029 sec
    Panics Since Last Report:          2
    Anonymous UUID:                    9BDAC1D5-D704-45DB-A10F-AC4F09794632
    Fri Jan 11 10:26:23 2013
    panic(cpu 0 caller 0xffffff80002c4794): Kernel trap at 0xffffff7f81764965, type 14=page fault, registers:
    CR0: 0x0000000080010033, CR2: 0xffffff823b07a312, CR3: 0x000000002075d033, CR4: 0x00000000000606e0
    RAX: 0x0000000010fdd000, RBX: 0x0000000000000000, RCX: 0x0000000000000000, RDX: 0x0000000000000000
    RSP: 0xffffff80efad3780, RBP: 0xffffff80efad3890, RSI: 0x0000000000000000, RDI: 0x0000000000000001
    R8:  0x000000000000000a, R9:  0x000000000000033c, R10: 0x0000000000000114, R11: 0x000000000000033c
    R12: 0xffffff8014ecf400, R13: 0x0000000000000000, R14: 0x0000000000000000, R15: 0xffffff823b07a316
    RFL: 0x0000000000010246, RIP: 0xffffff7f81764965, CS:  0x0000000000000008, SS:  0x0000000000000010
    CR2: 0xffffff823b07a312, Error code: 0x0000000000000000, Faulting CPU: 0x0
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    0xffffff80efad3430 : 0xffffff8000220792
    0xffffff80efad34b0 : 0xffffff80002c4794
    0xffffff80efad3660 : 0xffffff80002da55d
    0xffffff80efad3680 : 0xffffff7f81764965
    0xffffff80efad3890 : 0xffffff7f817737a0
    0xffffff80efad38b0 : 0xffffff7f8174758e
    0xffffff80efad38e0 : 0xffffff7f8178cb6f
    0xffffff80efad3910 : 0xffffff7f81786632
    0xffffff80efad3940 : 0xffffff7f8178a7d5
    0xffffff80efad3970 : 0xffffff7f81789aa1
    0xffffff80efad39e0 : 0xffffff7f8174e2b8
    0xffffff80efad3a10 : 0xffffff7f81785684
    0xffffff80efad3a30 : 0xffffff7f817519ce
    0xffffff80efad3b60 : 0xffffff7f8174ea4c
    0xffffff80efad3bc0 : 0xffffff8000655f3e
    0xffffff80efad3be0 : 0xffffff800065681a
    0xffffff80efad3c40 : 0xffffff8000656fbb
    0xffffff80efad3d80 : 0xffffff80002a3f08
    0xffffff80efad3e80 : 0xffffff8000223096
    0xffffff80efad3eb0 : 0xffffff80002148a9
    0xffffff80efad3f10 : 0xffffff800021bbd8
    0xffffff80efad3f70 : 0xffffff80002aef10
    0xffffff80efad3fb0 : 0xffffff80002daec3
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    com.apple.driver.AppleIntelHD3000Graphics(7.3.2)[A2328231-E577-32FF-B20F-D08BDC FE9C51]@0xffffff7f81745000->0xffffff7f817a8fff
    dependency: com.apple.iokit.IOPCIFamily(2.7)[5C23D598-58B2-3204-BC03-BC3C0F00BD32]@0xffffff 7f80849000
    dependency: com.apple.iokit.IONDRVSupport(2.3.4)[7C8672C4-8B0D-3CCF-A79A-23C62E90F895]@0xff ffff7f80d0a000
    dependency: com.apple.iokit.IOGraphicsFamily(2.3.4)[D0A1F6BD-E66E-3DD8-9913-A3AB8746F422]@0 xffffff7f80cd1000
    BSD process name corresponding to current thread: WindowServer
    Mac OS version:
    11G63
    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: FF3BB088-60A4-349C-92EA-CA649C698CE5
    System model name: MacBookPro8,1 (Mac-94245B3640C91C81)
    System uptime in nanoseconds: 89046313254656
    last loaded kext at 88474284704160: com.apple.driver.AppleBluetoothHIDKeyboard          160.7 (addr 0xffffff7f807cd000, size 20480)
    last unloaded kext at 88668819820313: com.apple.driver.IOBluetoothHIDDriver          4.0.8f17 (addr 0xffffff7f808cf000, size 73728)
    loaded kexts:
    com.parallels.kext.prl_hid_hook          6.0 12106.692267
    com.parallels.kext.prl_hypervisor          6.0 12106.692267
    com.parallels.kext.prl_usb_connect          6.0 12106.692267
    com.parallels.kext.prl_vnic          6.0 12106.692267
    com.parallels.kext.prl_netbridge          6.0 12106.692267
    com.apple.filesystems.smbfs          1.7.2
    com.apple.driver.AppleHWSensor          1.9.5d0
    com.apple.filesystems.ntfs          3.10.1
    com.apple.driver.AudioAUUC          1.59
    com.apple.driver.AGPM          100.12.75
    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.AppleIntelHD3000Graphics          7.3.2
    com.apple.driver.SMCMotionSensor          3.0.2d6
    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.AudioIPCDriver          1.2.3
    com.apple.driver.AppleSMCLMU          2.0.1d2
    com.apple.driver.ApplePolicyControl          3.1.33
    com.apple.driver.ACPI_SMC_PlatformPlugin          5.0.0d8
    com.apple.driver.AppleLPC          1.6.0
    com.apple.driver.AppleBacklight          170.2.2
    com.apple.driver.AppleMCCSControl          1.0.33
    com.apple.filesystems.autofs          3.0
    com.apple.driver.AppleUSBTCButtons          227.6
    com.apple.driver.BroadcomUSBBluetoothHCIController          4.0.8f17
    com.apple.driver.AppleUSBTCKeyboard          227.6
    com.apple.driver.AppleIRController          312
    com.apple.iokit.SCSITaskUserClient          3.2.1
    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.IOAHCISerialATAPI          2.0.3
    com.apple.iokit.IOAHCIBlockStorage          2.1.0
    com.apple.driver.AppleSDXC          1.2.2
    com.apple.driver.AppleUSBHub          5.1.0
    com.apple.driver.AppleFWOHCI          4.9.0
    com.apple.driver.AirPort.Brcm4331          561.7.22
    com.apple.iokit.AppleBCM5701Ethernet          3.2.4b8
    com.apple.driver.AppleSmartBatteryManager          161.0.0
    com.apple.driver.AppleEFINVRAM          1.6.1
    com.apple.driver.AppleAHCIPort          2.3.1
    com.apple.driver.AppleUSBEHCI          5.1.0
    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.driver.AppleUSBAudio          2.9.0f5
    com.apple.driver.DspFuncLib          2.2.5a5
    com.apple.iokit.IOSurface          80.0.2
    com.apple.iokit.IOSerialFamily          10.0.5
    com.apple.iokit.IOFireWireIP          2.2.5
    com.apple.iokit.IOAudioFamily          1.8.6fc18
    com.apple.kext.OSvKernDSPLib          1.3
    com.apple.driver.AppleHDAController          2.2.5a5
    com.apple.iokit.IOHDAFamily          2.2.5a5
    com.apple.driver.AppleSMC          3.1.3d10
    com.apple.driver.IOPlatformPluginLegacy          5.0.0d8
    com.apple.driver.AppleGraphicsControl          3.1.33
    com.apple.driver.AppleSMBusPCI          1.0.10d0
    com.apple.driver.IOPlatformPluginFamily          5.1.1d6
    com.apple.driver.AppleBacklightExpert          1.0.4
    com.apple.iokit.IONDRVSupport          2.3.4
    com.apple.driver.AppleSMBusController          1.0.10d0
    com.apple.kext.triggers          1.0
    com.apple.driver.AppleIntelSNBGraphicsFB          7.3.2
    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.iokit.IOSCSIMultimediaCommandsDevice          3.2.1
    com.apple.iokit.IOBDStorageFamily          1.7
    com.apple.iokit.IODVDStorageFamily          1.7.1
    com.apple.iokit.IOCDStorageFamily          1.7.1
    com.apple.iokit.IOSCSIArchitectureModelFamily          3.2.1
    com.apple.driver.AppleThunderboltNHI          1.6.0
    com.apple.iokit.IOThunderboltFamily          2.0.3
    com.apple.iokit.IOUSBUserClient          5.0.0
    com.apple.iokit.IOFireWireFamily          4.4.8
    com.apple.iokit.IO80211Family          420.3
    com.apple.iokit.IOEthernetAVBController          1.0.1b1
    com.apple.iokit.IONetworkingFamily          2.1
    com.apple.iokit.IOAHCIFamily          2.0.8
    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
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    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 (5.106.198.19.22)
    Bluetooth: Version 4.0.8f17, 2 service, 18 devices, 1 incoming serial ports
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    Serial ATA Device: Hitachi HTS545050B9A302, 500.11 GB
    Serial ATA Device: MATSHITADVD-R   UJ-898
    USB Device: FaceTime HD Camera (Built-in), apple_vendor_id, 0x8509, 0xfa200000 / 3
    USB Device: hub_device, 0x0424  (SMSC), 0x2513, 0xfa100000 / 2
    USB Device: BRCM2070 Hub, 0x0a5c  (Broadcom Corp.), 0x4500, 0xfa110000 / 5
    USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x821a, 0xfa113000 / 8
    USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0245, 0xfa120000 / 4
    USB Device: hub_device, 0x0424  (SMSC), 0x2513, 0xfd100000 / 2
    USB Device: IR Receiver, apple_vendor_id, 0x8242, 0xfd110000 / 3

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    https://discussions.apple.com/community/notebooks/macbook_pro
    https://discussions.apple.com/community/mac_os?view=discussions 
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