Testing websites in all kind of OS en browser version setups can be difficult. Lot’s of tools are online available to do this, but most of them are quite expensive. Microsoft has released a list of virtual machines for every browser and OS version ons https://dev.modern.ie/tools/vms/mac/
First you need to download Virtual Box (https://www.virtualbox.org/).
A free tool to run virtual machines, installing is pretty easy.
Next you can download the required virtual machines of the Microsoft site and run them in Virtual Box.
I mostly check my websites in IE 9 on Win7, IE 10 on Win8 en IE 11 on Win8.1 to be sure.
And this all for free!