If you are running Windows 7, Windows Server 2008 R2 or SBS 2011 with Service Pack 1 then you may experience the following error:
STOP: 0x0000007F (parameter1, parameter2, parameter3, parameter4) UNEXPECTED_KERNEL_MODE_TRAP
This can occur in a number of scenarios such as initiating a data transfer over the network or resuming the computer/server from sleep/hibernate. Ultimately the issue is related to the operating system not allocating enough stack space. The issue can be resolved by applying the hotfix from the Microsoft Article KB 2519736 http://support.microsoft.com/kb/2519736