microsoft word no undo

Is this in all documents?

It is so in all documents created using Word, but not in Powerpoint, Notebook etc, but there are other functions that only Word can perform.

Are the documents protected? have you tried unprotecting them?

um...I don't know how to protect or de-protect them...

What version of Word?

um...whenever I click on it, a square-like thing pops up and says it is 2010 WORD, apart from this I don't know...

Are these documents you created yourself, or did you get them from another person?

um...I created them myself, and I've never tried to tamper with any of the settings.

Go in Tools - Options and check that Undo Levels is set to some number greater than zero.

um...The problem is...where is TOOLS?

I think you click the File Tab in the upper left corner.

Learn where menu and toolbar commands are in Office 2010 and related products

http://office.microsoft.com/en-001/outlook-help/learn-where-menu-and-toolbar-commands-are-in-office-2010-and-related-products-HA101794130.aspx

That's really a good q, WB, and while we're at it, I wonder if anyone knows a way to easily default the entire contents of one's System Preferences

For instance with an inadvertent keystroke all went from black letters on white background to white on black, was that way for 2 weeks until my sons steered me to Universal Access

How would one ever guess that it would be found under that heading