When you use an Internet Protocol security (IPsec) tunnel mode connection to communicate from a Windows Vista-based computer to another computer, the Windows Vista-based computer may restart. Also, you may receive an error message that resembles the following:

STOP 0×000000D1 (parameter1, parameter2, parameter3, parameter4)
DRIVER_IRQL_NOT_LESS_OR_EQUAL

This problem occurs if you install antivirus filter drivers on the Windows Vista-based computer.