Computer shuts off when watching YouTube on Safari

My computer has simply shut itself off several times now, and each time it happened, it was when I was watching YouTube videos with Safari version 5.06.
A few times beforehand, Safari has crashed while on YouTube, and I got an error message saying something may be wrong with a Flash 10.4-10.5 plugin.
Is there anything I can do to fix this?

Hi, let's see if we can garner more clues. Video can really heat things up.
Get Temperature Monitor to see if it's heat related...
http://www.macupdate.com/info.php/id/12381/temperature-monitor
iStat Menues...
http://bjango.com/mac/istatmenus/
And/or iStat Pro...
http://www.islayer.com/apps/istatpro/
If you have any temps in the 70°C/160°F range, that's likely it.
Except IntelMacs like yours...
http://www.intelmactemp.com/list
How Much free space is on the HDD?
Open Console in Utilities & look for the Date/Time of the last crash in all logs.

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Close All Open Apps... Perform a Reset... Try again...
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http://support.apple.com/kb/ht1430

Computer turns off when watching a video

Hi My computer crush and turn off when I watch a quicktime movie.
This is the report. any suggestions please?
Interval Since Last Panic Report: 153655 sec
Panics Since Last Report:          5
Anonymous UUID:                    11544156-15FD-4DA4-B3C9-2EFAD4118B6F
Mon Jan 7 15:53:52 2013
panic(cpu 3 caller 0x5b9d85d7): NVRM[0/1:0:0]: Read Error 0x00000100: CFG 0xffffffff 0xffffffff 0xffffffff, BAR0 0xc0000000 0x7eafa000 0x0a5480a2, D0, P3/4
Backtrace (CPU 3), Frame : Return Address (4 potential args on stack)
0x92483bd8 : 0x21b455 (0x5d09dc 0x92483c0c 0x2238b1 0x0)
0x92483c28 : 0x5b9d85d7 (0x5bbe500c 0x5bc53f80 0x5bbf22f4 0x0)
0x92483cc8 : 0x5baeb179 (0x8a6c804 0x7439004 0x100 0x0)
0x92483d18 : 0x5bae2cae (0x7439004 0x100 0x92483d48 0x5b9c8881)
0x92483d48 : 0x5c2123a0 (0x7439004 0x100 0x438004ee 0x0)
0x92483e88 : 0x5bb08f45 (0x7439004 0x7437004 0x0 0x0)
0x92483ec8 : 0x5b9e1836 (0x7439004 0x7437004 0x0 0x0)
0x92483f08 : 0x54985d (0x0 0x8a6a080 0x1 0x29d54e)
0x92483f58 : 0x54888e (0x8a6a080 0x7be725c 0x73b0044 0x73b001c)
0x92483f88 : 0x548ce8 (0x7be7240 0x7be7240 0x0 0x7fff)
0x92483fc8 : 0x29e6cc (0x7be7240 0x0 0x10 0x81607e4)
      Kernel Extensions in backtrace (with dependencies):
         com.apple.nvidia.nv50hal(6.1.8)@0x5c0d8000->0x5c4f9fff
            dependency: com.apple.NVDAResman(6.1.8)@0x5b974000
         com.apple.NVDAResman(6.1.8)@0x5b974000->0x5bc55fff
            dependency: com.apple.iokit.IOPCIFamily(2.6)@0x53476000
            dependency: com.apple.iokit.IONDRVSupport(2.2)@0x5abca000
            dependency: com.apple.iokit.IOGraphicsFamily(2.2)@0x5ac2f000
BSD process name corresponding to current thread: kernel_task
Mac OS version:
10F2108
Kernel version:
Darwin Kernel Version 10.4.1: Fri Jul 16 23:04:20 PDT 2010; root:xnu-1504.7.51~1/RELEASE_I386
System model name: MacBookPro6,2 (Mac-F22586C8)
System uptime in nanoseconds: 15148038544690
unloaded kexts:
com.apple.filesystems.msdosfs          1.6.2 (addr 0x5aab3000, size 0x53248) - last unloaded 10619568223259
loaded kexts:
com.apple.filesystems.msdosfs          1.6.2 - last loaded 15105074103948
com.apple.driver.StorageLynx          2.5.4
com.apple.driver.Oxford_Semi          2.5.4
com.apple.driver.LSI_FW_500          2.5.4
com.apple.driver.IOFireWireSerialBusProtocolSansPhysicalUnit          2.5.4
com.apple.driver.initioFWBridge          2.5.4
com.apple.driver.AppleHWSensor          1.9.3d0
com.apple.filesystems.autofs          2.1.0
com.apple.driver.AGPM          100.12.12
com.apple.driver.AudioAUUC          1.9
com.apple.driver.AppleMikeyHIDDriver          1.2.0
com.apple.Dont_Steal_Mac_OS_X          7.0.0
com.apple.driver.AppleUpstreamUserClient          3.4.0
com.apple.driver.AppleMikeyDriver          1.9.3f5
com.apple.driver.AppleIntelHDGraphics          6.1.8
com.apple.driver.AppleHDA          1.9.3f5
com.apple.driver.AudioIPCDriver          1.1.5
com.apple.driver.AppleMCCSControl          1.0.17
com.apple.driver.AppleIntelHDGraphicsFB          6.1.8
com.apple.driver.SMCMotionSensor          3.0.0d4
com.apple.iokit.AppleBCM5701Ethernet          2.3.9b3
com.apple.kext.AppleSMCLMU          1.5.0d3
com.apple.driver.AppleGraphicsControl          2.8.68
com.apple.GeForce          6.1.8
com.apple.driver.AirPortBrcm43224          425.16.2
com.apple.driver.ACPI_SMC_PlatformPlugin          4.3.0d3
com.apple.driver.AppleLPC          1.4.12
com.apple.driver.AppleUSBTCButtons          1.8.1b1
com.apple.driver.AppleUSBCardReader          2.5.4
com.apple.driver.AppleUSBTCKeyboard          1.8.1b1
com.apple.driver.AppleIRController          303.8
com.apple.iokit.SCSITaskUserClient          2.6.5
com.apple.BootCache          31
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1
com.apple.iokit.IOAHCIBlockStorage          1.6.2
com.apple.driver.AppleUSBHub          4.0.0
com.apple.driver.AppleFWOHCI          4.7.1
com.apple.driver.AppleSmartBatteryManager          160.0.0
com.apple.driver.AppleEFINVRAM          1.3.0
com.apple.driver.AppleUSBEHCI          4.0.2
com.apple.driver.AppleUSBUHCI          4.0.2
com.apple.driver.AppleAHCIPort          2.1.2
com.apple.driver.AppleACPIButtons          1.3.3
com.apple.driver.AppleRTC          1.3.1
com.apple.driver.AppleHPET          1.5
com.apple.driver.AppleSMBIOS          1.6
com.apple.driver.AppleACPIEC          1.3.3
com.apple.driver.AppleAPIC          1.4
com.apple.driver.AppleIntelCPUPowerManagementClient          105.11.0
com.apple.security.sandbox          0
com.apple.security.quarantine          0
com.apple.nke.applicationfirewall          2.1.11
com.apple.driver.AppleIntelCPUPowerManagement          105.11.0
com.apple.iokit.IOFireWireSerialBusProtocolTransport          2.0.1
com.apple.iokit.IOFireWireSBP2          4.0.6
com.apple.driver.AppleProfileReadCounterAction          17
com.apple.driver.AppleProfileTimestampAction          10
com.apple.driver.AppleProfileThreadInfoAction          14
com.apple.driver.AppleProfileRegisterStateAction          10
com.apple.driver.AppleProfileKEventAction          10
com.apple.driver.AppleProfileCallstackAction          20
com.apple.iokit.IOSurface          74.0
com.apple.iokit.IOBluetoothSerialManager          2.3.7f1
com.apple.iokit.IOSerialFamily          10.0.3
com.apple.driver.DspFuncLib          1.9.3f5
com.apple.iokit.IOAudioFamily          1.7.6fc2
com.apple.kext.OSvKernDSPLib          1.3
com.apple.driver.AppleSMBusController          1.0.8d0
com.apple.iokit.IOFireWireIP          2.0.3
com.apple.iokit.AppleProfileFamily          41
com.apple.driver.AppleHDAController          1.9.3f5
com.apple.iokit.IOHDAFamily          1.9.3f5
com.apple.iokit.IO80211Family          311.1
com.apple.iokit.IONetworkingFamily          1.9
com.apple.driver.AppleSMC          3.0.1d2
com.apple.driver.IOPlatformPluginFamily          4.3.0d3
com.apple.driver.AppleSMBusPCI          1.0.8d0
com.apple.nvidia.nv50hal          6.1.8
com.apple.NVDAResman          6.1.8
com.apple.iokit.IONDRVSupport          2.2
com.apple.iokit.IOGraphicsFamily          2.2
com.apple.driver.BroadcomUSBBluetoothHCIController          2.3.7f1
com.apple.driver.AppleUSBBluetoothHCIController          2.3.7f1
com.apple.iokit.IOBluetoothFamily          2.3.7f1
com.apple.iokit.IOUSBMassStorageClass          2.6.1
com.apple.iokit.IOSCSIBlockCommandsDevice          2.6.5
com.apple.driver.AppleUSBMultitouch          205.32
com.apple.iokit.IOUSBHIDDriver          4.0.2
com.apple.driver.AppleUSBMergeNub          4.1.0
com.apple.driver.AppleUSBComposite          3.9.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice          2.6.5
com.apple.iokit.IOBDStorageFamily          1.6
com.apple.iokit.IODVDStorageFamily          1.6
com.apple.iokit.IOCDStorageFamily          1.6
com.apple.driver.XsanFilter          402.1
com.apple.iokit.IOAHCISerialATAPI          1.2.4
com.apple.iokit.IOSCSIArchitectureModelFamily          2.6.5
com.apple.iokit.IOUSBUserClient          4.0.0
com.apple.iokit.IOFireWireFamily          4.2.6
com.apple.iokit.IOUSBFamily          4.1.0
com.apple.iokit.IOAHCIFamily          2.0.4
com.apple.driver.AppleEFIRuntime          1.3.0
com.apple.iokit.IOHIDFamily          1.6.5
com.apple.iokit.IOSMBusFamily          1.1
com.apple.security.TMSafetyNet          6
com.apple.kext.AppleMatch          1.0.0d1
com.apple.driver.DiskImages          286
com.apple.iokit.IOStorageFamily          1.6.2
com.apple.driver.AppleACPIPlatform          1.3.3
com.apple.iokit.IOPCIFamily          2.6
com.apple.iokit.IOACPIFamily          1.3.0

Kernel panics are usually hardware related. Disconnect all peripherals from your computer and try the suggestions mentioned in these articles - Kernel Panics? Don't panic too! and   "You need to restart your computer" (kernel panic) message appears (Mac OS X v10.5, 10.6)
Crashing can cause directory damage. Therefore, you should do the following to check after resolving your kernel panic issue -
Disconnect all peripherals from your computer.
Boot from your install disc & run Repair Disk from the utility menu. To use the Install Mac OS X disc, insert the disc, and restart your computer while holding down the C key as it starts up.
Select your language.
Once on the desktop, select Utility in the menu bar.
Select Disk Utility.
Select the disk or volume in the list of disks and volumes, and then click First Aid.
Click Repair Disk.
Restart your computer when done.
Repair permissions after you reach the desktop-http://support.apple.com/kb/HT2963 and restart your computer.
Mac OS X (10.6.4)
Use Software Update to update your os to 10.6.8 and anything else that needs to be updated. The combo update may help your situation. Outdated os, software & hardware can cause issues with your computer. For 3rd party items, you will need to check with the manufacturer for all updates.

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Computer powers off when running youtube/games(miniclip games) or any other video/flash thing...?

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Could be something to do with your GPU/graphics card. Please give us more info about your machine (series, model ...). I would try to update the video card driver first.
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**Click the KUDOS thumb up on the left to say 'Thanks'**
Make it easier for other people to find solutions by marking a Reply 'Accept as Solution' if it solves your problem.

Computer shuts down when calibrating

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is your notebook still in warranty? Warranty status check web page
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Best regards,
erico
****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
2015 Microsoft MVP - Windows Experience Consumer

Computer shuts off when watching YouTube on Safari

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