There is a major difference, one gives you an annoying little pop up, the other doesn't that's why people like the cracked version.
Besides you don't seem to know anything, when you look up winrar on google you'll end up with the old 3.71, I'm providing al ink to a FREE, CRACKED, NEW version, WinRar 4.1.65.
Also, he doesn't have to go searching for it. You're most probably just mad that you couldn't help him out. while I could.