I think most people will agree the spell checks like the one built in MS Word are a boon. However they do like to change spellings that are correct when they come across words they have not seen before.

Then there are the ones like this: “Ewe like two go too there house”. It wouldn’t change that because all the words in the sentence are in the dictionary.

Joan, my wife, gave me this one:

MY NEW SPELL CHECKER

Eye halve a spelling chequer
It came with my pea sea
It plainly marques four my revue
Miss steaks eye kin knot sea.

Eye strike a quay and type a word
And weight four it two say
Weather eye am wrong oar write
It shows me strait a weigh.

As soon as a mist ache is maid
It nose bee fore two long
And eye can put the error rite
It’s rare lea ever wrong.

Eye have run this poem threw it
I am shore your pleased two no
It’s letter perfect awl the weigh
My chequer tolled me sew.

SAUCE UNKNOWN

Attrib. to Martha Snow.

The only word MS Word didn’t like was chequer and that was because it is set to US spellings.