From a support forum: "Try changing the NIC's network adapter link speed from auto negotiate to manual as per your requirement to 100 MBps or 1000 MBps. This might solve your issue."
From a support forum: "The E1000 NIC also show disconnects but not as frequent as the E1000E. So both Intel NICs are problematic. I tried installing the latest Intel drivers (downloaded from www.intel.com) without any significant results, the network still disconnects as often as before.
In the meantime, I have switched all NICs to VMXNET3 and it works very well."
From a support forum: "Install VMware tools , remove e1000 network card after a VM stop, add a card same vswitch etc but, with a vmxnet3 type. Don't use the default card! Start and enjoy this solution . E1000 and E1000e are just unstable in Windows 8 / Windows 2012 , the network card reset randomly with or without heavy I/O."