I want to give a family birth day movie to my friend.but I don't want him to see some scenes.I want to cut or delete these scenes.how can I edit this movie clip?

Use Windows Movie Maker. It's free and likely already installed if you have a Windows PC.

Haha, I just noticed that you have a pirated copy of Win 7. Never mind my advice. If you try to install it your OS will likely get notice by MS.

Thank you sir.thanks to the "heroes of piracy programmings".
I got another window 7 with every thing.now no problem at all.
Thanks to you for being there.