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Orange.
It is free to update the app.
This antivirus will cost you around 30 to 50 a year. It will give licenses for up to 3 computers to use. It is a very large and fully featured software.
its free actruly
$19.95
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This depends on the damage that has been done to the computer already. Any good antivirus should be able to remove them. I recommend Kaspersky. The total cost could be all the data on your computer, any personal information on your computer including bank account numbers and other targets of identity theft. Be careful though of antivirus scams. There are many "false reports" of viruses, or virus hoaxes, that tell you to delete a file from your computer, but in fact they are simply strangely named system files that are either required for the system to run, or are needed by important programs such as your computer's built in firewall software. Any reputable Antivirus program will not delete these files, so your best bet is simply to purchase a good antivirus.
For what system
You cannot do much many antiviruses slow down computer. You have two choices. First one is to live with the antivirus which you already have. Second one is to install another antivirus (there are some which don't put too much load on computer).
The price for a CCTV system varies depending on how much surveillance you want. A simply system costs about $100, while a more thorough system would cost $500 and up.
The Motorola rival can be used as a contract update and when ordered online will only cost $29.99 with shipping and tax fees for a total of $32.09