It seems that ANY process that calls WinSqmStartSession in ntdll.dll will start crashing when MachineThrottling is enabled in the registry, which seems to happen as a result of CEIP running. Rafael from withinwindows has discovered that fault lies with the SQM Client which is part of the Customer Experience Improvement Program. Like mp3 bug this windows 7 bug is more dangerous which could led to need of formatting windows 7. In this bug SQM client causes windows 7 Explorer or msiexe.exe to crash. After Windows 7 mp3 bug here is another bug finding of windows 7.