When I pressed w key, H11.0.784 falled apart. The Message is below:
Problem signature:
Problem Event Name: APPCRASH
Application Name: hmaster.exe
Application Version: 11.0.0.784
Application Timestamp: 4e02da23
Fault Module Name: StackHash_84ca
Fault Module Version: 6.1.7601.17514
Fault Module Timestamp: 4ce7c8f9
Exception Code: c0000374
Exception Offset: 00000000000c40f2
OS Version: 6.1.7601.2.1.0.274.10
Locale ID: 1033
Additional Information 1: 84ca
Additional Information 2: 84cabacc6522618345a73c77b35d7ce9
Additional Information 3: 2665
Additional Information 4: 2665632df3dab695fdd5e0eff744aa97

My Computer: ThinkPad W500
Video Driver Version: 8.792.5.0 (24/Apr/2011)