OK, so I have a Windows Vista... more specifically this: http://www.newegg.com/Product/Product.aspx?Item=N82E16883103182 a Acer Aspire AX3200-U3600A Desktop.
I know, I know. Kill me.
Anyway, this computer did not come with a CD key if I recall correcty. I want to reimage it but wouldn't I need the installation CD?