Hi and 
Are the applications (*.exe) files the ones that crush?
Yes
Edit:
Latest crashlog from Steam failure to launch:
Problem signature:
Problem Event Name: APPCRASH
Application Name: Steam.exe
Application Version: 1.84.85.72
Application Timestamp: 51f2e856
Fault Module Name: StackHash_7156
Fault Module Version: 6.1.7601.17725
Fault Module Timestamp: 4ec49b8f
Exception Code: c0000374
Exception Offset: 000ce6c3
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 1044
Additional Information 1: 7156
Additional Information 2: 7156dace5949360345328aaf3736d6aa
Additional Information 3: 60a4
Additional Information 4: 60a436b033a9e35a1bb856949a002ecf
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Edited by nochiro, 12 August 2013 - 03:32 PM.