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google "flash troubleshooting"
first hit ("Installation problems | Flash Player | Windows 7 and earlier")
then go to the bottom of the page (where it says "Still having trouble?". there's direct links to the full downloads of all three versions (activex, npapi, and ppapi)
I go there whenever the check flash version page says I'm out-of-date (I use chromium, not chrome, so I have to check manually)