Thre is no single brand that is preferred by repair shops; each has a bias but it does not reflect on one product being superior over another.
anything thats works good,and efficient,,its not always some big popular brand ,,,,they use little not so much popular brands sometimes
For transferring data and not to surf the companies let the internet for transferring data and not to surf the people use big companies uses the internet for transferring data and not to surf.
i have seen many shops using Kaspersky… not the free version but the pay and use version..