The Art of Getting Back On Topic Without Really Getting Back On Topic
Aside from browsing the internet, there are other potential threats to your PC. For instance, somebody could come by your empty work station and do God Knows What to your computer.
Set passwords.
A trick I use at work where my computer is potentially vulnerable to a casual passerby with a head injury is as follows. (I work with head injuries.)
Make and save a picture of your desktop. Make that picture your desktop wallpaper. Now hide your icons--use a toolbar so you can get to them easily as needed. Hide the toolbars. Now anybody who comes by and tries to open an app by clicking on an icon will think the computer has frozen and they will leave it alone. Of course this also works as a practical joke on your sister's machine, but I am not endorsing such jokes. To heighten the effect change the cursor from an arrow to an hourglass.
