but why turboactivate is not compatible with Windows 2000 ?
wyBuild will be dropping support for Windows 2000 in an upcoming version. wyUpdate and the AutomaticUpdater are compatible with Windows 2000 because it costs us nothing to maintain the compatibility -- we use Windows features that happen to be in Windows 2000. We will drop support the second we need to use a feature that isn't in Windows 2000.
In short: we support Windows 2000 because it costs nothing to support it. All of the Windows XP+ features we use are also a part of Windows 2000. The second we use a feature not part of Windows 2000 we drop support (like we will be for wyBuild).
Also, Windows 2000 has a minuscule market share. It's really tiny. Plus Windows XP has full backward compatibility with Windows 2000, so there's no reason for anyone to be using an outdated and insecure system.
could you make a change and give turboactivate compatible with Windows 2000
Like I said before, TurboActivate supports Windows 2000 in the limited form: it can check & save product keys and it can verify saved product keys, plus your can use trials & trial extensions. However, you can't activate on Windows 2000 due to technical limitations of the system.
If supporting Windows 2000 involved no extra work, then we would gladly support it. However this is not the case. Windows 2000 lacks several necessary system functions for activations to work. This is not just a whim, we estimate it would cost us more than 3 months of work to support this system that very, very few people use.
We will not be adding the huge amount of work for an outdated Windows operating system that Microsoft no longer supports. Tell your users to upgrade to Windows XP -- it supports all Windows 2000 applications. Plus, Windows XP licenses can be found cheaply.