Sitefinity 3.6 Installation Error – Unknown error (0x80005000)

Hi TechyV!
I am moving my files and programs from my laptop to a  secondhand desktop unit that I have recently acquired.
When I tried running the Sitefinity 3.6 installation this message came up.
I have followed the same steps I have done when I installed this on my laptop.
My laptop and the desktop both run on Windows Vista Home Basic and I have not bothered to reformat everything on the desktop.
I don't know what's causing the error when I try it on the desktop, as I have had no trouble when I installed it on my laptop.
If you have any ideas or suggestions it will help greatly.
Thanks.

Sitefinity 3.6
Installing Sitefinity 3.6Â Â Â Â
         The program features you selected are being installed.
              Error Creating Virtual Directory telerik.
                          Exception details:
                          Unknown error (0x80005000)
  InstallShield
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