I need help in windows 7 Ultimate..

My C Derive got full (out of space) once. and I removed lots of useless software and stuffs to clean my Local Disk.. but after some time I found that my local dist again showing me low Disk Space.. even I didn't installed anything on my computer new..
so basically my Local Dist Eating my storage automatically and I need a solution for this. I don't want to repair or re-install the windows.

Some one here could help me about that?

I'll give a tip anyone who resolve my problem..