You got a trojan installed. Police will be useless.
1) You could reformat your computer. You will loose all your stuff on the primary though.
2) You could goto a Comp Repair service, pay a shitload of money.
3) You could stay off the internet permanently.
4) You could download HijackThis and post the log on MPGH (and we can tell you the program thats the trojan and how to delete it)
5) You can block the trojan by clearing all programs from your access list on your firewall, and just allow the ones that are MADE BY COMPANIES.
The guy knows exactly what websites you visit, and what you type, so be careful.