virtualbox.org

Hi,
I'm trying to set up a Linux VM (Ubuntu 14.04) on my Windows 7 PC (32-bit) but i'm getting the "failed to create the virtualbox COM object" error
I've tried to specify both 32-bit and 64-bit ubuntu, but i can't even get to the stage of adding the .iso file to the VM.
I've also looked at other threads who detail uninstalling, reinstaling and deleting various .virtualbox files and folders but nothing has helped (i've also tried the compatibility mode fix to no avail),
I've tried 4.3.18, 4.3.28 and 5.0.6 versions of VirtualBox but they all give me the same error

The details of the error are

Callee RC:
E_INVALIDARG (0x80070057)

and when i click okay, another box pops up with the following details:


Result Code:
E_FAIL (0x80004005)
Component:
Machine
Interface:
IMachine {480cf695-2d8d-4256-9c7c-cce4184fa048}

Any pointers would be great, as things i've found on other topics don't seem to make a difference...

Thanks