Startnow.com virus

I got the Startnow.com virus on my Chrome browser.  It is a redirectional virus which won't let me navigate, and keeps sending me to various other websites.  I finally just stopped using Chrome and I uninstalled it from my computer.   After a couple of days I tried reinstalling Chrome from Google's website.  Startnow.com was there again, so I am assuming it is lurking somewhere on my hard drive although Norton didn't pick it up.  What do I do?  I am currently using Explorer as my browser, but it seems to be acting oddly too.  Is there something out there which will help me get rid of this virus?