Cisco VPN client issue

Windows 8.1 with Bing, came with a netbook computer.
Need to make work the Cisco VPN client which gives the following error on a connect attempt:

Secure VPN Connection terminated locally by the Client, Reason: 440 Driver Failure

Tried this solution to install Citrix DNE. Did not help.

The event viewer shows that the driver signature can not be verified.
Desperatly did the following to make it work:

1. Turned off the BitLocker. Well, why I need a secured notebook which I can not use?
2. Disabled UEFI's Secured Boot. 
3. Executed the following commands:
   bcdedit -set loadoptions DISABLE_INTEGRITY_CHECKS
   bcdedit -set TESTSIGNING ON
4. Reinstalled the Cisco VPN client.

Works now!

No dial-up for VPN

If the SonicWall VPN client suddenly asks for a PhoneBook number that could be cured. Go to the properties and under the Peer tab choose "LAN only". From here.

Dynamic DNS

To prevent windows' DNS server from creating A records on all other interfaces the server might have (such as OpenVPN) to the dynamic DNS list, go to the DNS server's properties and exclude all the interfaces you don't need.

OpenVPN

After a while (some time of not using), the OpenVPN server broke down.
The secured connection istablishes, but IP does not go.

I guess, the problem in the IP routing. I don't know what I did, but after server rebooted, the connection start working.

The routing table on the server looks as below:

C:>route print 10.8*

IPv4 Route Table
===========================================================================
Interface List
0x1 ........................... MS TCP Loopback interface
0x2 ...00 ff 3d 7b 61 e5 ...... TAP-Win32 Adapter V8
0x10004 ...00 13 72 69 2d 0c ...... Broadcom BCM5708C NetXtreme II GigE (NDIS VBD Client)
===========================================================================
===========================================================================
Active Routes:
Network Destination Netmask Gateway Interface Metric
10.8.0.0 255.255.255.252 10.8.0.1 10.8.0.1 30
10.8.0.0 255.255.255.0 10.8.0.2 10.8.0.1 1
10.8.0.1 255.255.255.255 127.0.0.1 127.0.0.1 30
Default Gateway: 10.0.0.1
===========================================================================
Persistent Routes:
None

There are still questions for me. Why routing to 10.8.0.0 via two gateways - 10.8.0.1 and 10.8.0.2 ?
10.8.0.1 - is the address of the TAP IP interface, but what is 10.8.0.2 then?
The address of the "modem pool"?

Same way, on the client the interface address 10.8.0.6, but 10.8.0.5 - P-t-P - what's that?

Good instructions about setting OpenVPN up are located here:
http://www.runpcrun.com/howtoopenvpn


And don't forget, when you want to connect a machine behind the server it has to have route to the 10.8.0.0 network as well.