I wish to install an application called SPAD.next for Saitek Flight instruments on A Windows 10 Pro PC. Avast probbaly does block the creation of a new folder. I tried all possible combinations OFF (Firewall, Coreshields, Ransomware Shields, etc) the Windows Defender is off. I always get the message "Setup was unable to create the directory “C:\Users..etc Error 123 The filename, directoery name or volume label syntax is incorrect” Any Ideas anyone? THank you in Advance