I didn't know we had to upgrade to windows 7 to run the Autodesk Building Design suite. So now we have 4 machines with Windows XP and now way to get our upgrade. However, it does say on Autodesks website that ACA 2014 is compatible with Windows XP. I need to know how to install ACA 2014 on our computers with Windows XP and not using the ABDS installation since it tells me that our OS is incompatible. I've tried to go to the ACA folder and use the Setup.exe file in there but it tells me that I need to use the ABDS setup file. Since Autodesk did not tell us that Windows XP would not be supported when we were automatically upgraded to the BDS from the Revit suites we did not plan for this in our budget. How can I get ACA 2014 installed on our computers?