My iMac screen suddenly turn black and white when I'm in fullscreen mode. What could be the cause of this problem?

Hi, once in a while the screen on my 5K imac turns black and white when I'm on youtube watching videos in fullscreen mode. It also exits the fullscreen mode automatically from one second to the next and a warning pops up saying how I can exit the fullscreen mode. Does anyone have an idea why this happens and if this is a software or hardware problem?

I'm using a Dell laptop with Windows 7. I've set the resolution to 1024x768, though the maximum resolution on this can go as high as 1366x768. So this is a problem that no one has been able to figure out? I've ran lots of other Flash-based applications that went fullscreen with no problem, so I'm wondering what other methods there are to try, if possible.

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    0xffffff8101a83c20 : 0xffffff7f81e8fe6a
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                dependency: com.apple.iokit.IOPCIFamily(2.7)[5C23D598-58B2-3204-BC03-BC3C0F00BD32]@0xffffff 7f8076c000
                dependency: com.apple.iokit.IONDRVSupport(2.3.4)[7C8672C4-8B0D-3CCF-A79A-23C62E90F895]@0xff ffff7f80991000
                dependency: com.apple.iokit.IOGraphicsFamily(2.3.4)[D0A1F6BD-E66E-3DD8-9913-A3AB8746F422]@0 xffffff7f80958000
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    last unloaded kext at 140047186917169: com.apple.driver.AppleUSBEthernetHost    2.3.6 (addr 0xffffff7f80845000, size 20480)
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    com.parallels.kext.prl_vnic    7.0 15107.796624
    com.parallels.kext.prl_netbridge    7.0 15107.796624
    com.parallels.kext.prl_hid_hook    7.0 15107.796624
    com.parallels.kext.prl_hypervisor    7.0 15107.796624
    com.parallels.kext.prl_usb_connect    7.0 15107.796624
    com.rim.driver.BlackBerryUSBDriverInt    0.0.67
    com.apple.driver.AppleBluetoothMultitouch    70.12
    com.apple.nke.pppoe    1.7
    com.apple.filesystems.smbfs    1.7.2
    com.apple.driver.AppleHWSensor    1.9.5d0
    com.apple.filesystems.autofs    3.0
    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.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.AppleUpstreamUserClient    3.5.9
    com.apple.driver.ApplePolicyControl    3.1.33
    com.apple.driver.AppleSMCPDRC    5.0.0d8
    com.apple.driver.AppleSMCLMU    2.0.1d2
    com.apple.driver.ACPI_SMC_PlatformPlugin    5.0.0d8
    com.apple.driver.AppleMuxControl    3.1.33
    com.apple.driver.AppleLPC    1.6.0
    com.apple.driver.AppleMCCSControl    1.0.33
    com.apple.GeForce    7.3.2
    com.apple.driver.AppleIntelHDGraphics    7.3.2
    com.apple.driver.AppleIntelHDGraphicsFB    7.3.2
    com.apple.driver.SMCMotionSensor    3.0.2d6
    com.apple.driver.AppleUSBTCButtons    227.6
    com.apple.driver.BroadcomUSBBluetoothHCIController    4.0.8f17
    com.apple.driver.AppleIRController    312
    com.apple.driver.AppleUSBCardReader    3.0.6
    com.apple.driver.AppleUSBTCKeyboard    227.6
    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.IOAHCIBlockStorage    2.1.0
    com.apple.iokit.IOAHCISerialATAPI    2.0.3
    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.AppleEFINVRAM    1.6.1
    com.apple.driver.AppleSmartBatteryManager    161.0.0
    com.apple.driver.AppleRTC    1.5
    com.apple.driver.AppleUSBEHCI    5.1.0
    com.apple.driver.AppleACPIButtons    1.5
    com.apple.driver.AppleAHCIPort    2.3.1
    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.AppleMultitouchDriver    231.4
    com.apple.driver.IOBluetoothHIDDriver    4.0.8f17
    com.apple.nke.ppp    1.7
    com.apple.kext.triggers    1.0
    com.apple.driver.DspFuncLib    2.2.5a5
    com.apple.iokit.IOSurface    80.0.2
    com.apple.iokit.IOSerialFamily    10.0.5
    com.apple.iokit.IOAudioFamily    1.8.6fc18
    com.apple.kext.OSvKernDSPLib    1.3
    com.apple.iokit.IOFireWireIP    2.2.5
    com.apple.driver.AppleHDAController    2.2.5a5
    com.apple.iokit.IOHDAFamily    2.2.5a5
    com.apple.driver.IOPlatformPluginLegacy    5.0.0d8
    com.apple.driver.AppleSMBusPCI    1.0.10d0
    com.apple.driver.AppleGraphicsControl    3.1.33
    com.apple.driver.IOPlatformPluginFamily    5.1.1d6
    com.apple.driver.AppleBacklightExpert    1.0.4
    com.apple.driver.AppleSMBusController    1.0.10d0
    com.apple.nvidia.nv50hal    7.3.2
    com.apple.NVDAResman    7.3.2
    com.apple.iokit.IONDRVSupport    2.3.4
    com.apple.iokit.IOGraphicsFamily    2.3.4
    com.apple.driver.AppleSMC    3.1.3d10
    com.apple.driver.AppleUSBBluetoothHCIController    4.0.8f17
    com.apple.iokit.IOBluetoothFamily    4.0.8f17
    com.apple.driver.AppleUSBMultitouch    230.5
    com.apple.iokit.IOUSBHIDDriver    5.0.0
    com.apple.driver.AppleUSBMergeNub    5.1.0
    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.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.driver.AppleEFIRuntime    1.6.1
    com.apple.iokit.IOHIDFamily    1.7.1
    com.apple.iokit.IOAHCIFamily    2.0.8
    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.driver.AppleKeyStore    28.18
    com.apple.iokit.IOUSBMassStorageClass    3.0.3
    com.apple.driver.AppleUSBComposite    5.0.0
    com.apple.iokit.IOSCSIBlockCommandsDevice    3.2.1
    com.apple.iokit.IOStorageFamily    1.7.2
    com.apple.iokit.IOSCSIArchitectureModelFamily    3.2.1
    com.apple.iokit.IOUSBFamily    5.1.0
    com.apple.driver.AppleACPIPlatform    1.5
    com.apple.iokit.IOPCIFamily    2.7
    com.apple.iokit.IOACPIFamily    1.4
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    Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1067 MHz, 0x0000, 0x000000000000000000000000000000000000
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    USB Device: Internal Memory Card Reader, apple_vendor_id, 0x8403, 0xfa130000 / 4
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    USB Device: Built-in iSight, apple_vendor_id, 0x8507, 0xfd110000 / 4
    USB Device: IR Receiver, apple_vendor_id, 0x8242, 0xfd120000 / 3

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