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.
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Trojans are pretty much the same as you installing a key logger program on your own computer to see what others are typing. Its just someone besides you wanting to know what you are typing. If you are running a ghost key logger program on your computer your antivirus will pick it up as a Trojan
minecraft cost 7.99 or 6.99 for any computer
a billion dollars
depended on the computer
500.00
$600
about 15000
How much did personal computers cost from 1900-2010?
every computer can get a virus -------------------------------------------------------------------------------------------------- Sort of. There are only a handfull of viruses for mac and they are ALL trojans. They do not do much damage nearly as much as windows viruses.
It depends on your computer's use, brand, configuration and so on.
$17.00 here in the US