I see your computer has AVG, Malwarebytes, SpywareBlaster, TuneUp Utilities which means you super serious on security and with your developing software programs you are a C++ developer which makes sense. Wow! Anyways on to your question my guess is with you being so protective of malware you have a strong firewalls make sure you have White listed SI in all your firewalls. Windows firewall may be one you forget. Another thing that you may have accidentally done is left your User Account Control high and blocked it. Let me know if this helps.