I have removed SpeedZooka and have asked for a refund that they are giving me. I have downloaded the free CCleaner that works fine and is not treated as a Virus threat. I know that the experts say that registry cleaning will not improve the speed of one's PC. (Certainly with a fast i7 processor a few less lines in the registry is neglible). But often a registry cleaner like CCleaner will allow you to clean out all the temporary/junk files left by browsers, installers etc... Also I have found that when I have deleted an application called lets say 'fred' and then look in my registry there are loads of 'fred' entries all over the place. As this is the heart of the OS system, I just want to keep it clean and tidy. A pity that software company/writers can't un-install properly. So I hear what so called experts say, but I still like cleaning my registry, and I am not doing for just a speed up. Plus I do lots of backups, and have a recovery disk and saved image, plus all my data backed up. So thanks for your reply. I will treat this as closed.