I´ve just installed a Windows 10 TP build 10049 VM in Parallels Desktop 10 on a new MacBook Pro running OSX Yosemite v. 10.10.3. The VM is configured with the default sharing options. I can see the shared folders like Documents, Downloads, Music, Pictures etc., but I can´t open the folders. When I click on the "Paralells Shared Folders" shortcut on the desktop, I get an "\\psf is not accesible" error. I can access the Windows folders from Finder in OSX. Hope someone can help with this.