After Installing OS don't pay any money for any antivirus programs!
Download & Install the following 3 freewares. It forms a free complete security suite for your system!
1. Avira Anvivir - http://www.free-av.com/en/download/index.html .
Avira is best & light solution for excellent overall system protection & internet security with real time updates, .
I do not have much faith in These cleaners they seem to do more harm than good.
I have used them before and was told by a computer tech to keep away from them.
Thanks for the info and i am sure i will back soon.