SalonTarget suggests everyone use anti-virus software and keep it up to date. However, some anti-virus software may interfere with USB devices connected to you computer. These could include credit card swipers, printers, signature pads, etc. Understanding how to configure your anti-virus software correctly will insure that your system stays safe from viruses and at the same time, allows your USB devices to operate normally. Should you have issues with devices connected through the UBS ports please review your anti-virus setting for USB devices. If you are not sure how to correctly configure your anti-virus software please call the software manufacturer. Most anti-virus software performs automatic updates which could cause a device that operates normally one day to fail the next for seemingly no apparent reason. Common error messages may include “Could not read card data please retry” or “Dymo printer not connected”.