Hi, When I'm starting to think about it, it is very obvious the the NIC driver is cause. Whenever I Undocked the laptop, or plugged out the Ethernet cable, the laptop crashed. I'll inform you if one if the following helped me. [edited] Well, there is no new version for my NIC driver so I have disabled the checksum. I have disabled the it in the following: Offloading Receive TCP checksum Offloading Transmit TCP checksum {Problem still occurs} Hi, I still get BSOD. This is what appears in the event log: Event Type: Information Event Source: Save Dump Event Category: None Event ID: 1001 Date: 18,06,2008 Time: 11:08:17 User: N/A Computer: **** Description: The computer has rebooted from a bugcheck. The bugcheck was: 0x40000080 (0x89bdc8c8, 0x8976ff30, 0xf78babb8, 0x00000001). A dump was saved in: C:\WINDOWS\Minidump\Mini061808-03.dmp. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. I have attached three dump files from today Minidump18_06.zip