Some time ago I had to change my system locale from Czech (default) to Japanese because I needed to run some Japanese programs that would otherwise crash.
The problem is, after switching back to Czech, my command prompt would launch with the Shift-JIS encoding whenever I opened it from the Win+R dialog (which is my preferred way of launching cmd). It would also draw characters in a strange bloated font. The problem persists even after uninstalling Japanese from my system altogether.
If I open cmd any other way (Start menu, Right-click Start -> Command Prompt, cmd.exe...), everything works correctly. All settings that I could think of are set to Czech:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Nls\CodePage (OEMCP value)Another thing is that Regedit always opens on HKEY_CLASSES_ROOT\MIME\Database\Codepage, though I don't know if that's related to the problem.
I'm running Windows 10, after the free upgrade from 8.1 and 7. Picture shows the different cmd windows.
Settings are stored a number of places. Look here for a codepage value and delete it.
HKCU\Console\%SystemRoot%_system32_cmd.exe\