cannot open and ask for latest version.
try to open a pdf file but it ask for upgrading to the latest version.
I check for update and it shows the latest version
try to open a pdf file but it ask for upgrading to the latest version.
I check for update and it shows the latest version

You said "NOT DOING THIS", what am I not doing?
This is actually the first time I have seen this message. I have seen similar symptoms many times from people who said they were opening in Acrobat or Reader - even when asked to check - and only a screen shot finally confirmed they were not. Sorry to doubt, but this has been universal.
So, in this case I think we can simply believe the message. Your version of Acrobat is very old. I don't know what features in a PDF might give this message.
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