The SGOS license has Expired

I freak out yesterday because I was unable to open some websites like google and yahoo. It is weird because other sites or working like Facebook. Every time I tried to access a site mostly I will get his error

Access Denied (license_expired)

A license has expired on the Proxy, and your request is not permitted: "The SGOS license has expired" A new license must be obtained.
For assistance, contact your network support team. 

At first I thought my best friend's blog was blocked because that was the first site that I opened that I got the error. But then when I started to open other sites I started to get the same error. I try it on both mozilla and google chrome browser and still no go. I tried it on IE and I cannot open other sites too. I tried to ping google and it is working fine. 

Before this problem my husband install a tool bar that caused pop ups on our mozilla browser. I panic and thought this might be a virus that is starting to ruin our internet. I started to run different cleaner like super antispyware, avg scanner, dial-a-fix, combo fix. smitfraudfix etc. I got really sleepy after running those scans that I was not able to try to browse again. The last thing that I tried was to play DOTA through GG client in which I was getting server is offline. Later I will check our internet and hoping it is already ok. I am not sure though if it is a virus or what. I've read online that some were able to fix it by just turning their modem and router off.