Need for Speed 2015 pc don't start

Same for me, game was working fine until 2 days ago.

Trying to play today, won't start.

Tried repairing game from origin options, to no avail.

@TiReNiX

@BuryTomorrow12

It is possible you guys have some software running at startup that could be causing your issue.

Try a clean boot before starting the game and let us know how you get on: http://support.microsoft.com/kb/929135

Thanks for the answers!
I tried to fix the ActivationUI.exe like you said.
But then I looked into my /Core folder and there is no ActivationUI.exe...
Tried to repair the game with origin again, but no ActivationUI.exe....

Is this a donwload bug? Tried to download the game completely new... but again no .exe in the core folder.
Someone can help???

@TiReNiX

Here is the full path for the activation file, do you see the file there?

C:\Program Files (x86)\Origin Games\Need for Speed\Core\ActivationUI.exe

Is your issue with the most recent NFS game?

Soo.. to prove this missing ActivationUI.exe file:
Here is a screen for you, I already redownloaded the hole game!

And why is this post designated with solved when my problem isn't solved???

@TiReNiX

It is possible your antivirus or other security software is removing that file. Can you check the quarantine location of your security software for the file, there should be a way to 'whitelist' the file and return it to its original location.

Thanks for the answer. Yes it was my antivirus that said it was a malware and removed it without asking.
So it works fine again!

@TiReNiX

Good news - thanks for the update! Hope you will enjoy the game now :-)

Same problem here. I've tried clean boot, I've granted admin rights and again I hit play and nothing happens. I've also updated my graphics drivers, repaired the game... doesn't work.

My PC is pretty good, i played Dishonored 2, Rise of the Tomb Rider in the last week without any problems. 

Any other suggestions, please?