Do you want to know when something will change on your computer?
For example when installing software or when you have clicked on a link and or clicked on an email and suddenly your computer wants to install something.
Then turn on the User Account Control.
Go to the Control Panel , User Accounts and click on the User Account Control to change settings.
I would recommend the " Always Notify Me " setting , yes it will nag but it may also save you if unfamiliar software tries to install