I ve been using these kaspersky internet security since o ve bought my pc.the engineer who first came to install my total setup adviced me to protect my computer woth many types of viruses instead of leting th harm the pc so kapspersky is running really good my pc is safe since a year and no virus issues till now have happened.the finctions have become secured and are not behaving unproperly.the installation is easy like you install other dvds it is also the same way.features and functions are really good cuz after opening pc it allows us to detect viruses and refresh our computer properly and it will not takd morr than a minute.service and support is for long time and repeatable also.you can buy and install it again in your pc after expiry of your previous anti virus.