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#11
This might be a long-shot but what happens if you uninstall Chrome and then try reinstalling a fresh copy? Perhaps there was a glitch during original install of Version 21. If you want to give this a try I recommend using Revo Pro to uninstall. (It has a free 30 day trial period.) Revo has a forced uninstall option that is pretty good at finding those obscure bits and pieces that usually get left behind when using the native Windows uninstall process.
Revo Uninstaller Pro - Uninstall Software, Remove Programs easily, Forced Uninstall