After my trip to Italy I’ve found that my PC’s homepage has switched to Nbsallastar.com. I’ve never heard of Nbsallastar.com virus before so I though I did something to accidentally change my homepage to this site. But it soon turned out that it is impossible to remove Nbsallastar.com from my browser and roll back the changes. What should I do about it? How to I get my old browser back?