I installed Zorin 17 Core as a Guest on Windows 10 host, using VB. Two odd things happen. First, Zorin flickers a lot, especially when I launch a browser, such as Chrome. The other problem is that my cursor becomes a dark square. My System settings are as follows: 4096 MB Base Memory, 2 CPUs , Execution Cap: 100%. My Display settings: Video Memory 128 MB, Monitor Count 1, Scale Factor 100%.
I never had these problems with Zorin 16 Core.