Opinion on movie editing program?

I got a fancy JVC video camera for christmas, an Everio Full HD with 120 GB internal memory, model no. GZ-HD320BU to be exact. I really love video and am into editing, so i was a bit dissapointed when i realized the camera didn't come with an editing program it self. I went out and bough Adobe Preimeire Elements, but it was unable to recognize the HD .mtv file type. I then bough Pinnicle Studio 12, which DID recognize the file type, but was too much for my laptop to handle and went painfully slow and the final rendered movie skipped. By now I don't really care about effects and all the bells and whistles, I just want to be able to cut a clip, put clips together, and basically just make a simple home video. Anyone PLEASE have/know a program that small memory laptops can take the .mtv file type? I'd really like to JUST EDIT MY MOVIES! Please help me!