On 15/09/10 16:12, Christian Verbeek wrote: > Vista (32bit and 64bit) and Windows 7 (32bit) do not make any difference > to the compiler so you would just have to decide for one OS (I would > recommend Windows 7 32bit, which is the mainstream right now). Oh, how I wish that were so. We didn't bother with a Windows 7 test machine for quite a while under this very assumption. Unfortunately, we have found many times that software that tests fine under Vista fails under 7, and vice versa. The compiler may not care, but the runtime appears to. Geoff