Hello, i will setup a virtual machine with Windows 8.1 for this, just like you suggested. I've done similar projects before in Delphi (managing kernel drivers, raw disk access etc.) so i would say this is not hard but rather time consuming project for me (have to make sure that new code is working exactly like the original one), that's why i set it to 3 days. Do you have preferred Delphi version for this ? Once awarded, I will start immediately.