Italian spellchecking and thesaurus

[Arnaldo Zulian]

Hi, there,
I'm using open office 4.1.7 version, of Windows 10.
I do not know what happened. When I write, the words are red underlined.
I tried to solve the problem downloading the program. The problem remains.
I was not able to solve the problem following the suggestions of other
users.
Can you help me?
Thanks.
Arnaldo