how to unlock excel protected file?

[compfreak]

Hello everybody,

I have excel file with .xlsx extension, which is password protected, my friend asked me if I could to unlock it, because she does not remember password.
I tried many softwares, but none of them was helpful, could anyone please help me. is there any way to unlock it?

I only know that password is no longer than 4 charachters...

Thank you for any help

Regards
Anri

[Salmon Trout]

my friend asked me if I could to unlock it, because she does not remember password.

Yeah right.