Code page 437 is the original MS-DOS character set on the PC. See http://en.wikipedia.org/wiki/Code_page_4… . In this character set, character 236 is ∞ .
But Microsoft later invented other code pages for different languages or to be more similar to the Windows code page 1252. Windows Code page 1252 covers western European languages and is the normal Windows code page installed on computers where the language is set to a form of English. The DOS code page that most closely resembles Windows code page 1252 was originally Code page 850. See http://en.wikipedia.org/wiki/Code_page_8… . In this code page character 236 has the value ý. When the Euro system € was invented, Microsoft invented yet another DOS code page which they called 858 which was identical to Code page 850, except that it included € instead of ı, the dotless i. See http://en.wikipedia.org/wiki/Code_page_8… .
Você pode ter uma página de código diferente instalada.
Eu tenho visto algumas pessoas relatando que adicionar um 0 adicional ao início ajuda. Então, você poderia tentar ALT + 0 0 1 2 0
Ou você tem alguma ferramenta de mapeamento instalada, como o AutoHotKey ou um gerenciador da área de transferência que está fornecendo resultados indesejáveis.