Ive uninstalled (with ccleaner)and redownloaded the file;
4.38 MB (4,595,648 bytes)
Keep getting same error. 
Also just tried installing:
<http://www.microsoft.com/downloads/en/confirmation.aspx?familyId=9b2da534-3e03-4391-8a4d-074b9f2bc1bf&displayLang=en>
But this has not helped either.

I tried the previous 3.3 version and this runs OK on my setup