Kill process in order to install.

[chropose]

I am using Windows 7 Ultimate 32 bit with latest updates.

When i was installing a program (here is the program link) i have to forcefully kill setup.exe from command prompt and then run the program again to finally able start the installer.

So basically it's just like this:
1. I mount the image and execute Setup.exe
2. Because nothing happens, i go to command prompt to kill the process (Setup.exe). I used this command:

taskkill /f /im setup.exe /t

3. After that, i go execute Setup.exe again and everything is now fine.

My question is, what is happening here and how to solve this so i can install the program normally?

Thanks.