Cubase 10 very Slow

CB10 is very slow, display, even when you click on menu bars. I had cubase 9, used to work great. I uninstalled all the previous version and reinstall CB10 to be sure that no conflict were engaged but still the same issue. I also tried to create a new song on CB 10(to avoid a CB 9 compatibility issue), still very slow. By the way, I also have wavelab, and it still work great so I do not think the problem is coming from an hardware issue.
Any ideas? Is someone has the same issue?