I buy kaspersky antivirus, can someone else use it if he knows my license key?

Yes, but he would probably have to have the disk that it came with for it to work.

I buy kaspersky antivirus, can someone else use it if he knows my license key?vincent

May be Yes

May be No

Because if its no, it might tell the person this CD key is already in use.

I buy kaspersky antivirus, can someone else use it if he knows my license key?adware remover

Yes, he only needs to download the software (Trial version or *illegal* complete version) and in "options", put your license key and connect to the server.

If you purchased a 1-PC only license, then it might tell him that the key is already in use and not let him use it.