|go into add remove programs. see if you can remove anything from there.|
deleting anything where u think u may have got this "virus". downloads etc.
Try downloading and running Adware or Malware bytes
If you can work out the name of the virus or if u get the exact messages this virus is giving you and its symptoms then usually you can just type it in google and there will several fixes or virus checkers or programs that will be suggested to remove it posted by people who have experienced the same thing.
Also you could try AVG anti virus. Think there is a free 30 day trial for it on the internet.
Hope this helps