I have three wallets running on three different machines just fine. Theres an issue on your end..
How is possible to be on my end, I tried on two different Windows versions, tried 2 wallet versions, from this thread, disablem firewall and antivirus temporarely, and behaviour is the same.
Here is debug.log files from both wallets :
https://mega.co.nz/#!LURzWYSS!qjGNIUD3VomgWzLmcGQhi9gqvPPM9X7sMcxoq386KiM
https://mega.co.nz/#!CAQRQTpS!rc0HrjTQwclduro670Wa3ZE-llcgKgZa-6NyGkyAAo0