Thanks for your prompt reply.
I will a wait a bit to see if any one else can come up with any solution.
If not I guess I will have to move to VMware Player.
I guess I have a similar problem. Installed Virtual Box 4.2.14 on Windows 8.1 Pro Preview.
VirtualBox Host-Only Network is causing problem with my existing Realtek NIC.
Issue: Windows put on sleep mode. Then wake up windows from sleep and Realtek NIC has no network connection.
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