Your system may lose network connectivity in Windows 7 operating system and a bang in Device Manager will appear on the Network adapter. This may be observed after the system resumes from Sleep (S3) state. This issue may occur when:
ME firmware version is equal to or newer than 11.6.27.3264
Windows 7 Operating System
Consecutive Sleeps(S3) events, without hibernation(S4)or system Restarts between each Sleep(S3) event.
System Network adapter is the Intel I219 LAN