i7_4790k + GTX 980(latest nvidia driver)

Windows 10 Task View is having problems with Start10 (normal version and the beta) in that :

1)occasionaly when Task View is clicked one of the window is an empty rectangle with title (usually chrome)

2)occasionaly when a task is selected it appears as normal then another window(task) will appear on top.

3)occasionaly when Task View is clicked the active tasks appear under the current window and cannot be selected.

Uninstalling Start10 resolves all these problems