The recent ones look legit. Just look at the crispness of the Windows logo/button when the start menu lights up. Pretty hard to fake that one element. (The fake ones look like a bad anti-alias job).
seems to be fake simple google search shows its windows 7 sp1 C3516BC5C9E69FEE6D9AC4F981F5B95977A8A2FA
Thx for the detective work. People apparently love trolling with win7 files and fake screenshots just before a leak.
I would say generally trolling with m$ windows, never heard of such kindergarten before other OSes had been released.
In the midst of all these rabble-roussers it's hard to believe anybody's report at this time. It is becoming more frustrating to accept any news coming in. The SHA1 HASH is one of the possible means available us to prove the validity of their claims.