Is there a parental monitoring program for windows 7?

So i'm 13 and I have been grounded for along time. I found a way I can play games like minecraft and skyrim on my computer, but a while ago my stepdad said he could se what I was doing on my computer. Was he talking about my history? If so I of course I can fix that. But is there a legitimate program that monitors the computer and the programs it is running? And if there's, how do I detect and remove it from my laptop? (I'm running windows 7, toshiba laptop, and I'm a administrator, but my stepdad has a second account.) Please no stupid answers!

If your stepdad is not an administrator, then he needs an administrator password to access your account. So, if you delete your history, you should be fine

Yes, there are 'nanny' programs that watch what you are doing.
No, you can't access or delete information that it stores.
Yes, there are setting that can prevent you from doing specific sites, and games.