I am using qV 12.10.0 version. I have created 3- tier architecture on my local PC (Windows 10). after the reload process I have noticed that some unknown language folders are creating by default to my working directory.
Is this a virus or expected? or do I need to re Install QlikView?
Those directories definitely shouldn't be there and indicate that something went sideways during the installation. Suggest you stop all QV services, delete those folders with the foreign characters, then uninstall/reinstall.