Error: Unsupported format on .exe files?

So, I have this vista laptop. I'm downloading apps, but it says "Unsupported Format"
Please help!
 

My Computer

System One

  • Manufacturer/Model
    Old 2003 Medion computer
    Motherboard
    See "System Manufacturer/Model Number"
    Memory
    2.00 GB
    Hard Drives
    3
    Internet Speed
    Slooooow.

Vistaar

Vista Guru
Not every app supports Vista these days. Did you look at the app's system requirements? Might be a good idea to mention the name of the app if you post again.
 

My Computer

System One

  • Operating System
    Vista Home Premium x86 SP2
    Manufacturer/Model
    HP Pavilion Elite m9150f
    CPU
    Intel Q6600
    Memory
    3 GB
    Graphics Card(s)
    NVIDIA GeForce 8500 GT
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