If you use a work-issued laptop or desktop computer, you’ve likely been tempted to check your personal email, store private files on the company’s Google Drive, or avoid work entirely by diving into a research rabbit hole that has absolutely nothing to do with your job. You probably shouldn’t do any of this on a computer provided by your employer.

Employers can install software to monitor what you do on your work-issued laptop or desktop. In the most watchful of workplaces, this may include keyloggers that can see everything you type or screenshot tools that track your productivity. What type of surveillance and security software is installed on your company computer is often based on two factors: how large the company is (and what resources it has to dedicate to this) and what type of information you deal with in your role. If you work with sensitive materials, such as health records, financial data, or government contracts, you can count on your employer keeping a careful eye on what you do.

For most of us, the fear of being heavily surveilled at work is unwarranted. Jesse Krembs, senior information security analyst at The New York Times, said, “Without supporting evidence, at scale this is pretty rare. It tends to generate a lot of useless data, rope the employer into liability issues, and generally make the team that monitors these surveillance systems miserable. That being said, almost all large companies have a targeted program for doing this, especially for dealing with suspected insider threat or fraud.”

Even if your every move isn’t being watched, it’s still best to assume your work computer is monitored and act accordingly. Here are some less obvious tasks you should be mindful of.