Norton hosed up my computer more than once. I have not used Norton in a very long time but it made my computer crash and things not work. Once I got rid of Norton and used another product, all worked. In addition, it failed to recognize some things on my husband's work computer that were found immediately by another security program.
In addition, it seemed to conflict with some of the software I used for ham radio operating.
But I hope Bigstock fixes it so sales do not slip.