this morning I turned on my notebook and said it failed to start. So it did a system repair, then when I can log in, the avast gadget was red (unsecured). I tried to turn it on, nothing. then I try to uninstall it the i got this message : Error reading product data C:\program files\alwil software\avast5\setup\part-setup_ais-509.vpx. setup cannot continue. what can id o to fix this?