Is this browser safe ?

Can anybody tell me whether the following browser is safe ? It has somehow intruded my PC and does not allow me to open my home page. How can I remove it ?
Update: Thank you all. I tried the steps suggested by Just Me but everything fails. I add the following details. As I try to enter through Mozilla Firefox this unwanted help comes in :
V9 web siteleri portalı-Ana sayfam-Brezilya'daki en iyi ve en mükemmel web site taraması!:
Update 2: Any suggestion from anybody ?
4 answers 4