hello

I have a virus on my computer and when i ran a scan on spybot search and destroy and tried to delete all redirected host it said it couldn't because it couldn't create folder C:/system32/folder/files/hosts (I forgot exactly what it said but it was something like that).
Most of the redirected hosts were from google and another one was bing.com..basically they're all search engines.
Does anyone know what i can do to get rid of these hosts and this virus?!