I can successfully install Flash 11.7.700.224 on Windows 7 Enterprise 64-bit. However, when I then go to print I get errors and printing doesn't work until I reboot. This is repeatable.
Example error messages from Adobe Reader, when printing, includes "The document could not be printed." and "There were no pages selected to print." Other applications fail to print as well. In another user's instance, their default printer was changed following the Flash installation but in my instance, it remained the same.