Fix for Windows 2000 users coming next build

I've fixed a crash in the GUI seen in Windows 2000. It was caused by use of the new process icon resolution code, which depended on newer APIs not available in Windows 2000. I suppose I shouldn't be surprised that Windows 2000 is still in use. For many tasks I do suppose it is a viable OS and there is no reason to change. Of course, many vendors have dropped support for it, but I have restored proper support in v5. This will be in v5.0.0.27, which is coming shortly.