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So, I just wanted to ask help regarding how to maintain access to a computer if you have physical access to it once. Lets say for example it is a cafeteria computer(bad example but i couldn't think of something else). You go up to it and setup task scheduler to run a particular file every hour or every time a computer restarts. This way it can be made part of a botnet as well as for personal gains.

Any help would be appreciated!