Here is the MSFT debugger analysis for this error (a mem dump can be generated if needed). This is easily reproduced while using the MSFT debugger running in a VM. The debugger in the VM is used to debug a real machine through a USB to serial adapter attached to the VM. My goal is to use the MAC to develop Windows drivers. I would also like to debug one Windows VM from another connected through a virtual serial port, but that fails very badly also. MODULE_NAME: USBPORT FAULTING_MODULE: 804d7000 nt DEBUG_FLR_IMAGE_TIMESTAMP: 41107d62 BUGCHECK_STR: 0xC5_2 CURRENT_IRQL: 2 FAULTING_IP: nt+74339 8054b339 8913 mov dword ptr [ebx],edx CUSTOMER_CRASH_COUNT: 4 DEFAULT_BUCKET_ID: WRONG_SYMBOLS LAST_CONTROL_TRANSFER: from 8054b31e to 8054b339 STACK_TEXT: WARNING: Stack unwind information not available. Following frames may be wrong. 80550004 8054b31e 81fddcb8 821910ec 81f91008 nt+0x74339 80550044 8054b0b9 81f91008 00000000 805500c0 nt+0x7431e 80550054 f7dfbfb1 81f91008 82117c40 81f91008 nt+0x740b9 805500c0 f7dfcb57 822bd458 00000000 821917d8 USBPORT+0x9fb1 805500f0 f7dfd754 026e6f44 821910e0 821910e0 USBPORT+0xab57 80550128 f7dfef6a 82191028 804e2eb4 82191230 USBPORT+0xb754 80550154 f7e0cfb0 82191028 804e2eb4 82191028 USBPORT+0xcf6a 80550190 f7e0d128 82191028 00000001 80558e80 USBPORT+0x1afb0 805501ac 804dbbd4 8219164c 6b755044 00000000 USBPORT+0x1b128 805501b0 8219164c 6b755044 00000000 821910ec nt+0x4bd4 805501b4 6b755044 00000000 821910ec 00000000 0x8219164c 805501b8 00000000 821910ec 00000000 806f372a 0x6b755044 STACK_COMMAND: kb FOLLOWUP_IP: USBPORT+9fb1 f7dfbfb1 ?? ??? SYMBOL_STACK_INDEX: 3 FOLLOWUP_NAME: MachineOwner IMAGE_NAME: USBPORT.SYS SYMBOL_NAME: USBPORT+9fb1 BUCKET_ID: WRONG_SYMBOLS Followup: MachineOwner ---------
