I don`t have such a program on my computer but have been advised to get one.I run WinXP Home with IE8. Any suggestions as to programs which do a thorough job will be very welcome and if they happen to be free then doubly so.
1. To block malware: Spywareblaster. To scan for, and remove malware: Superantispyware and Malawarebytes. All free. I would download and use all of them as sometimes SAS will find stuff that MAB does not, and vice versa.