OS incompatible with Autocad Architecture installation

I am trying to install AutoCAD Architecture 64 bit, but, it does not install because it is saying that there is an issue with the OS compatibility. I am not sure of what is going on, but, I need this to be installed right away.
I have a very important deadline to meet. I would also like to ask if I can convert AutoCAD 2010 to AutoCAD Architecture? I would really appreciate your immediate response on the matters at hand.
I may not be able to pass my subject if I cannot fix this issue in one hour. I desperately need your help with this problem.

Autodesk Inventor
Professional 2012 (English) 64
Bit
Open File "1fe9e1772cb8b7e4b56388a7ff44ec45ff8cba35'
? "1fe9e1772cb8b7e4b56388a7ff44ec45ff8cba35" is a file which was
downloaded from the internet. Are you sure you want to open it?
