Save the following into a file with ".reg" suffix:
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Console\%SystemRoot%_system32_cmd.exe]
"CodePage"=dword:0000fde9
Double click this file, and regedit will import it.
It basically sets the key HKEY_CURRENT_USER\Console\%SystemRoot%_system32_cmd.exe\CodePage
to 0xfde9 (65001 in decimal system).