If you do need to use a wi-fi hotspot, be certain that you navigate only to fully encrypted sites. Avoid apps that require personal or financial information.
I accidentally loaded an ”adware” when I downloaded a “free” piece of software. It claims to be harmless, but my research showed otherwise. It took hours for me to find out how to remove it and then find every instance of its existence on my computer to delete them. I learned that the “uninstall app” for this program actually installs it even deeper. It is important to read ever line of the text for what you are really doing when you download. It is also important to find online “help” communities for issues you face with your particular computer or programs. Apple and Microsoft are not just a phone call away for help with problems like this. Well-chosen forums can make all the difference. Look in several places online and cross-reference what you find.