Play the 10-bit video file in Dell Studio 1555 causes computer to turn off unexpectedly (ATI Mobility Radeon HD 4570)

I play this 10-bit video file, http://roy.orz.hm/samples/H.264-10bit-sample-railgun.mkv
in Dell Studio 1555 and sometimes it causes computer to turn off unexpectedly.
Normally, computer only behaves this way when it is related to graphic card problem.

• File: MKV, 10-bit
• Filter: LAV Filters 0.58.2 (Nightly, from K-Lite Codec Pack 10.0.9)
• Player: Media Player Classic - Home Cinema 1.7.0.44 (Nightly, from K-Lite Codec Pack 10.0.9)
• DirectX Video Acceleration (DXVA): Enabled
• Graphic card: ATI Mobility Radeon HD 4570
• AMD Catalyst Driver: 13.1 (8.97.100.7)
• Standard 3D Settings: Optimal Quality
• Operating system: Windows 7 with Service Pack 1 (RTM) x86
• CPU: Intel Core 2 Duo P8600
• Motherboard BIOS version: A13
• Computer: Dell Studio 1555