Security settings are an integral part of computing. These settings not only guard against unauthorised access but also protect against any kind of malware or virus attacks, coming from the internet or external drives. The most important part, however, is to choose these security settings judiciously otherwise day-to-day computer activities like downloading can be hindered. If you're having downloading problems caused by settings issues, you simply have to access the Custom Level option from Tools to make the required changes. Follow this guide for a detailed explanation.