This problem occurs due to the presence of the bug CSCdz63183.
Note: For testing purposes, complete these steps to reproduce the bug:
For a workaround, turn off the Stateful Firewall before activation of the Network Interface Card (NIC) or wireless card. Then plug in the cable or card and turn on the Stateful Firewall.
Alternatively, upgrade the software version to 4.8(0.440) or the latest. Refer to Software Download: Windows VPN Clients.