Could not load any browser after Personal Shield Pro Virus attacks

Please help sir!
last day my computer was infected by PERSONAL SHIELD PRO virus.
After I cleaned up with MBAM, definitely every browser that I used including internet explorer can't be used. I have reinstalled the browser but still can't be used. Registry system has been cleaned from {random}.exe. I have checked the host too and replaced with the new one that I downloaded, but still can't. Do you know why it happened!
Please help me I am a little bit confused here.
