Try removing Adobe Flash Player Plug-in from the list of installed programs, restarting your computer, and reinstalling Flash Player. (Use Chrome if you can; otherwise use any browser).
If that doesn't work, try an 'on top' installation of Chrome (i.e. without uninstalling it first). , I'd expect that to retain your bookmarks but, to be on the safe side, I'd advise exporting them to an HTML file first (so that you re-import them if they went missing).
If that doesn't work, consider uninstalling Chrome (after exporting your bookmarks!!!) and reinstalling again.
If you've still got problems, export your bookmarks and then import them into an alternative browser (such as Firefox).