I am using BitcoinZ Wallet 1.1.0_1.2.  I got an error similar to this.  Here's how I fixed it:

1.  Close the Wallet.
2.  Open a Windows Command Prompt in Administrator mode.
3.  Type in at the prompt> netsh winsock reset
4.  Wait for the message stating success - this includes that the computer must be restarted.
5.  Close the command prompt.
6.  Shut down (turn off) the computer.
7.  Turn on the computer.
8.  Open Bitcoin Z Wallet.

This worked for me. 

Something is getting corrupted with the sockets - they are not getting reset or disconnected in the correct sequence.  It has been more than 10 years since I programmed Java opening and closing sockets in the correct sequence. 

Hope this helps.