Why Excel suddenly askes for a password while I never set one?

[Tiny]

One day everything oke, the next day I can't open my file anymore, because
excel needs a password. I never set one. So I can't possibly know the
password.
How does this happen and how to revert it.

 

[JLatham]

Just out of curiousity, what version of Excel?

As to how? Unknown, most obvious would be that somehow you accidentally set
a password without realizing it. Less obvious - something got corrupted
somewhere.

Try these two links to see if they don't offer some help in getting the file
opened:
Unlocking Passwords:
http://www.straxx.com/excel/password.html
http://www.mcgimpsey.com/excel/removepwords.html

 

[Tiny]

Thanks for the answer,

The version is 97-2003 and running on Vista

Tryed the first link, did not work.

When I try to open my file, there come's the pop up, 'name file' is a
protected file
password:

I'm sure I never set one, I only remember that the day before the problem's
started when I saved the file, excel asked me something unusual aswell, I
don't remember what it was, but that might have changed something.

 

[JLatham]

If you want me to try, send the file attached to an email to (remove spaces)
Help From @ JLatham Site.com and I'll see what I can do. Somewhere around
here I have some tools that may uncover the password - but then again,
perhaps not. But we can't know for sure without trying, can we?