After upgrading to Win10, the folders don't work any more. I have reinstall the Parallels Tool, but it still cannot be solved.
It is working from the Mac, but when I click the folder from the Window, it may show black screen for one second and then folders still cannot be shown and opened.
As mentioned before, I have tried to reinstall and reopen the windows system, the same problem happened.
I understand that you have re-installed Parallels Tools and still the issue persist. Please try creating an empty virtual machine and check if the issue persist. Refer to this article.
I reinstall the Parallels Tools through the bar on the top of screen. Because I cannot open any folder as well as the control panel, I cannot try the method of the reference article.
It doesn't work also. The all windows about folders and control panel cannot be opened. Hope solve this problem in next version.