help to remove mcguard

i'm unable to remove mc guard from my applications... any time i drag and drop it into the trash it says that the application is open even if not!
It installed by itself yesterday afternoon and since I keep having porn websites coming up on my safari...
anyone could hep please?

Can you find it Activity Monitor ?
If so force quit the App and than drag it to the trash
Did you find it on you're account as a start-up item .
If so delete it

first boot into safe mode. (hold shift at start up).

then delete it from start up items, (in system preferences - accounts) and delete it from your applications folder.

bang, you are done.

Click software update, install the latest security patch, and while at it, go to Safari, preferences, general, and uncheck open safe files after downloading.