TimeSnapper Pro is a great security application that allows you to configure it to automatically take screenshots every certain interval that you impose on it, you can even record everything that happens in that interval on video, leaving in that recording all the activity that is Do on the computer.
TimeSnapper Pro allows you to apply filters to all the captures made so that you only get the ones that interest you most, also coming with a tool that details all the programs that have been used and what percentage of time has been used in each of them.
So you will have controlled, monitored and recorded everything that has happened on the computer.
You can free download TimeSnapper Pro 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.