cannot open web browse

My computer suddenly cannot go to internet. I already checked the connection is fine.
The situation is: When I use the browse to internet, it shown me the message 'resolving security connection' and take a long time. Finally, nothing to display in screen.

Please any CHing help me.

用 IE?

有无其他browser 例如 Firefox/Chrome 等试?
最好同部机彻底扫一次毒先

I already try diff. browser, but the speed still very slow.