STOP: 0x0000007F Unexpected Kernel Mode Trap Error in Windows 7
Some users have reported a problem of the Blue Screen of Death (BSOD) on Windows 7 SP1 during data transfer to or from another computer through a wired or wireless network connection.
The BSOD error says: “STOP: 0x0000007F. UNEXPECTED_KERNEL_MODE_TRAP.”
This same BSOD may appear when you restart a computer that is configured to automatically connect to a wireless network.
BSODs are not good for Windows. They should be fixed as soon as possible; else the computer may become unstable and this may result in loss of data.
According to Microsoft, this issue arises because the operating system does not allocate for enough stack space.
Microsoft has provided a Hotfix to this problem. You need to visit the Microsoft support site and request for the hotfix.
[Source: KB2519736]