I was going to tell you all that I had plucked up courage with an updated ZA (free) to install the updated Avast and that all was well.................except around 10% of my desktop icons are blitzed. I have restored all bar one (I had to re-create shortcuts and replace for all) BUT a pdf file on my desktop stubbornly resists an icon change from 'default blank' to Adobe Reader. File opens in Reader ok. I've been through Cp/Folder Options, selected the correct icon but the pesky thing will not take it. Any ideas? Registry?