We have Thin Clients T520 with installed ThinPro 6.1 OS (prev 5.2). When using RDP, running one application on RDWeb connection to a Windows 2012R2 server. We have issues with Windows dialogs, they will not stay on top but hiding behind the "main" windows. Same problems describet for Windows system RDWeb and hotfix KB2964832. Tested running RDWeb connection from an Windows 8.1 computer, there were no problems. Many fixes in the ThinPro 6.1 RDP, but this is still not fixed. What can I do?