I too have been suffering a similar issue. TV8 worked perfectly fine and I will roll back tomorrow on both machines to test again. Since TV9 I haven't been able to connect between my laptop and PC however I can use the Android app and both will connect fine. The laptop and PC are both on different networks too. I just get 'Reason unknown' after trying to connect even after setting up unattended access thus how I can connect using the App. I looked in the log files to try and see why. Booted machine I have access to and also reset modem and switch.
2014/01/16 18:25:32.635 6672 6676 G1 Trying connection to 411737541, mode = 1
2014/01/16 18:25:32.638 6672 5544 G1 CLogin::run()
2014/01/16 18:25:32.676 1380 6952 S0 CT21 CT.Send.CMD_MASTERCOMMAND_ENCRYPTED From=723476319 To=0 L=392
2014/01/16 18:25:32.724 1380 6952 S0 CT21 CT.Receive.CMD_MASTERRESPONSE_ENCRYPTED From=0 To=723476319 L=520
2014/01/16 18:25:32.728 1380 6952 S0 CT21 CT.Disconnect
2014/01/16 18:25:32.729 1380 6952 S0 MC.RR.411737541.CONNECT@37.252.232.5_10800_128000_807957485_411737541_10000__1_0_16778176_128000_16778176:128000;2147483647:1280000;4:640000_786297_786297
2014/01/16 18:25:32.729 1380 6952 S0 CT22 CT.TM_GWout.37.252.232.5 - CT22 - S21
2014/01/16 18:25:32.729 1380 6952 S0 CT22 CT.Connect to TeamViewer Router 37.252.232.5:5938
2014/01/16 18:25:32.776 1380 6952 S0 CT22 CT.Connected
2014/01/16 18:25:32.776 1380 6952 S0 m_GatewaySession.ConnectToRemote.Connected
2014/01/16 18:25:32.776 1380 6952 S0 CT22 TM.TM_GWout
2014/01/16 18:25:32.776 1380 6952 S0 CT22 CT.Send.CMD_IDENTIFY From=723476319 To=0 L=32
2014/01/16 18:25:32.777 1380 6952 S0 CT22 CT.Send.CMD_REQUESTCONNECT From=723476319 To=0 L=48
2014/01/16 18:25:32.777 1380 6952 S0 m_GatewaySession.ConnectToRemote.Connected.StartThread
2014/01/16 18:25:32.777 1380 6952 S0 CT22 CT.Send.CMD_SESSIONMODE From=723476319 To=0 L=28
2014/01/16 18:25:32.777 1380 5572 S0 CT22 CT.Run
2014/01/16 18:25:32.777 1380 5572 S0 CT22 TM.TM_GWout
2014/01/16 18:25:32.777 1380 5660 S0 CT20 CT.Run
2014/01/16 18:25:32.778 1380 5660 S0 CT20 TM.TM_TV
2014/01/16 18:25:32.778 6672 5544 G1 CLoginClient::NegotiateVersionClient()
2014/01/16 18:25:32.821 1380 5660 S0 CT22 Activating support for ccmdV2
2014/01/16 18:25:32.821 1380 5572 S0 CT22 CT.Receive.CMD_SESSIONID From=0 To=723476319 L=8
2014/01/16 18:25:32.822 1380 5572 S0 CT22 CT.Receive.CMD_IDENTIFY From=0 To=723476319 L=32
2014/01/16 18:25:32.831 1380 5572 S0 Negotiating session encryption: client hello sent to 411737541, RSA key length = 2048
2014/01/16 18:25:32.831 1380 2656 S0 CT23 CT.Run
2014/01/16 18:25:32.831 1380 2656 S0 CT23 TM.TM_UDP
2014/01/16 18:25:32.832 1380 2656 S0 CT23 GWT.InitUDPPingVersionHandshake
2014/01/16 18:25:32.905 1380 5572 S0 Negotiating session encryption: server hello received
2014/01/16 18:25:32.914 1380 5572 S0!! SecureNetworkConnection::CheckSignature: invalid signature on client hello
2014/01/16 18:25:32.914 1380 5572 S0!! SecureNetworkConnection::Handle_ServerHello: SignatureCheck failed [ remoteID: 411737541 connection: 1 remoteConnection: 0 ]
2014/01/16 18:25:32.915 1380 5572 S0!! NegotiateEncryptionV2::CheckState() STATE_NOTCONNECTED
2014/01/16 18:25:32.915 1380 5660 S0 CT22 CT.Send.CMD_ENDSESSION From=723476319 To=411737541 L=4
2014/01/16 18:25:32.961 1380 5572 S0 CT22 CT.Receive.CMD_DISCONNECT From=411737541 To=723476319 L=4
2014/01/16 18:25:33.004 1380 5572 S0! S21 NC.Read.Failed4
2014/01/16 18:25:33.004 1380 5572 S0 CT22 CT.Run.LoopEnd
2014/01/16 18:25:33.004 1380 5572 S0 CT22 CT.Disconnect
2014/01/16 18:25:33.004 1380 5660 S0 CT20 CT.Run.LoopEnd
2014/01/16 18:25:33.004 1380 5660 S0 CT23 CT.Send.CMD_DISCONNECT From=723476319 To=411737541 L=4
2014/01/16 18:25:33.005 1380 5660 S0!! S22 NC.SendUDP.Failed, Err=10047, Errorcode=10047
2014/01/16 18:25:33.005 1380 5660 S0!! S22 NC.SendDataUDP: SendDataUDPInternal result=-1, Errorcode=10047
2014/01/16 18:25:33.005 1380 5660 S0!! CT23 GWT.Send.Ignore.ErrorUDP, Err=10047, Errorcode=10047
2014/01/16 18:25:33.005 1380 5660 S0 CT20 CT.Disconnect
2014/01/16 18:25:33.005 1380 2656 S0 CT23 CTU.Run.LoopEnd
2014/01/16 18:25:33.005 1380 5572 S0 Session to 411737541 ended. Estimated capacity=0kBit/s, Latency=0ms
2014/01/16 18:25:33.005 1380 2656 S0 CT23 CTU.Run.LoopEnd2
2014/01/16 18:25:33.005 1380 2656 S0 CT23 CT.Disconnect
2014/01/16 18:25:33.005 1380 5572 S0 CSendCommandToMaster::SendBCommandToMaster: CC=3 CT=37
2014/01/16 18:25:33.007 1380 5572 S0! CT23 UDP statistics: rf=1
2014/01/16 18:25:33.007 6672 5544 G1!! CLoginClient::NegotiateVersionClient socket was closed while reading
2014/01/16 18:25:33.007 6672 5544 G1 CLogin::run() leave