My internet explorer isn't working since I downloaded ghostsurt,what should I do?

[BabyTigermewwmeww2]

I downloaded ghostsurf then it asked me some question about port and IP , I entered the IP of the VPN which I am using but my enternet explorer 8 isn't working now, I uninstalled ghostsurf but it is still isn't working, and when I try to download it from internet, it didn't work, can anybody please help ? thanks !!