Website Not Showing Up

So yesterday I changed anti-virus programs. It told me to update Oracle VM Virtual Box which I did and then after that the previous version of local by flywheel wouldn’t open. I uninstalled both programs and reinstalled them. Now I can’t see or access my site. I know where the folders are located for the site. This is my first website so if someone could provide very clear steps on how to fix this, that would be great. I tried making a new website and got an error message “Uh-oh! Could not update hosts file” then I copied and pasted the old files into the new directory but that did not work. Like I said I’m a newbie!