Hi Dazza and welcome to the forum family!
Copy and paste the following code into your HTML where you want the download link to be.
Then, replace the following...
yourwebsite - your domain (if you have a .net or something other than a .com, the of course you'll change that too).
downloads - the name of the folder the file is in (should be something cryptic to avoid theft).
software - the name of the file (if you make a zipped file, be sure to change the extension from .exe to .zip).
<a href="http://www.yourwebsite.com/downloads/software.exe"><b>Click Here to Download</b></a>
Hope that helps

~Karen