cudart64_50_35.dll is missing?

I just followed the instruction on this page:

I verified my GPU is CUDA capable. I have Asus G74S, with NVIDIA GeForce GTX 560M.
So, I downloaded Winodws 7 0x64 verion of the tool
And, when I downloaded and installed everything, as a test I tried to run deviceQuery.exe.
So, I tried this:
C:\ProgramData\NVIDIA Corporation\CUDA Samples\v5.0\bin\win64\Release>deviceQuery.exe

But I am getting this error:
cudart64_50_35.dll is missing from your computer. Try reinstalling the program to fix this problem.

Any idea what is happening? And how do I fix this?

Thanks in advance,

I also tried to recompile deviceQuery project in VC++ 2010, but still complains about the same thing.
If I run deviceQuery from inside VC++ 2010 IDE, in debig configuration, I can see that it works properly, and it displays all the information.
But, when I try to change to Release and run from outside of IDE, and instead run it from C:\ProgramData\NVIDIA Corporation\CUDA Samples\v5.0\bin\win64\Release>deviceQuery.exe,
that is when I get that error message.
So, please Advise,

Nevermind, guys…
It worked. I just had to restart my computer, and it worked.

I ran into the same problem, running deviceQuery.exe as administrator worked for me.

Running command prompt as an administrator solved the problem.Thank you.