Minecraft Folder - Don Goofed

My minecraft is acting like someone pooped on it. This is what happened. ------ I opened minecraft to play 1.7.2. When I launched it, Which I had already downloaded 1.7.2, It started downloading random things such as sounds in random folders. I have tried to get a new minecraft folder but couldn't. I could not delete the folder because it said it was opened in a program. I closed out of everything but it didn't work, it stated it is still opened in a new folder. I tried renaming the new one and putting it in and replacing the bad folder but that didn't work. Someone please help me and I have the newest Java version. I also couldn't rename the folder...