Free video editing software that can slow down video?

I will be shooting with a Nikon D5100. I think it can only go as high as 30fps. I would like it to be 1000fps but id think it's possible to change 30fps to 1000. Anyway, i need good slomo editing software that i can use with Windows 7. I tried getting Adobe CS6 but it did not work on my PC. I also have tried getting Sony Vegas but that also did not work. I have gotten AVS but i don't really like it. Any free software i can download?

Use Avidemux, tutorial in sources.