Cant remember when I got my computer. mabe I can track it with my serial number

Yes you can track your computer using its serial number however you have to have documents supporting the fact that it belongs to you and this can majorly be done if the computer is connected to the internet. Otherwise if it is not connected then it will be difficult to track it as no particular service will be monitored using other connections such as broadband and PC serial registration. So yes you can track your PC using the serial number after reporting to the police and they help out on the technical part.