My ten year old low spec laptop, used as a standby, has proved virtually unusable with Windows 10, so I have reverted to a 2012 image using Windows 7 – it now works fine but there is an antivirus problem. I have tried a number of times to update Security Essentials but every time it fails due to a spurious “internet problem”, so it is eight years out of date and as such provides no protection. I have downloaded free antivirus programs but when I try to activate the option is greyed out and when I try within the new program I cannot because “there is another program running”. Within control panel there appears to be the option to uninstall Security Essentials and if I do this I would hope then to be able to activate Avast or some such free program. I do not wish to take a step which might make things even worse – some advice please.