Ah, yes you are right!
I remember now. I tried to test how to encrypt files in windows7 but it didn't work, and I forgot it.
Although being encrypted, I can open them without the need to password, how is that?
Morever, I didn't encrypt them individually. Encryption is automatically applied on new files and folder and I want to stop it!
Do you know how to stop this strange encryption, please?
Thank you