I have got mcAfee on my laptop (vista) which was installed by sony when i sent the laptop off to be repaired. This has now expired and from what I can tell there is only a paid option to update which I dont want to do. I want to install avira which is what i had before sony changed it, have downloaded it but when i try and install it it just comes up with a runtime error message and won't work. Has anyone got any ideas what I can do? thanks