Locating Functional Copy of SM

[rzr]

So, I've been trying to locate a functional copy of SM. I've heard rumors that the later versions are corrupt or undownloadable and such. I've tried searching for the missing .dll file. I've tried updating windows - updating flash - updating browsers - updating installers, etc. I've gotten a new security program, and I've even reset this PC back to factory settings. Nothing has worked.
Can someone link me to a working copy of SM or explain how/why it doesn't?