Ok thanks ORAC Liam,have downloaded that, but before I run it, should I delete adaware and Zone Alarm from my system?, as I have stated in a previous post I had some problems because I had both adaware and spybot on the machine at the same time and it crashed my browser, I had to format and do a full reinstall.
It is my experience that it is third party software that does the damage in windows, I know it is impossible to go through life without third party software though, but I am always a bit reluctant to run this type of utillity, will give it a go though, these search engines that install themselves as your homepage infuriate me