I can only agree, because it was only a theory on my part.
Whatever the case, it would appear to be something that is changing Capital text as I type. I can live with it, but it would be nice to have a solution to the problem. Everything that I have tried, hasn't offered a solution.
"the problem seems to occur with all the browsers etc that I use"
What other spell checkers do you have installed? as some other browsers have their own checker and I'm thinking it may be some sort of conflict, though I don't know of any that do auto corrections. Usually just get a red line underneath misspellings.
MS Office does have auto correct if you set it up (don't know if that has anything to do with it)
I have spare keyboards, so I will give this a try.
There isn't MS Office on the computer in question (running XP). When time allows, I will have to dig deeper into the software, to see if I can pin-point anything there. I have a strange feeling that when I installed something some time ago, there was a tick box involved, that might have something to do with the fault.
I will tick this as resolved.
Thanks to those that have given their time and input on this question, much appreciated.
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