Install MySQL
Before installing a new version, back up and uninstall old ones (see below). Search for mysql community server, and select to download the installer:
Select the large file and download and run:
Choose "Add" if it does not come up automatically, and select the 64-bit MySQL server, the workbench x64, and the Connector/J.
2014-10-02: Australia: The installer crashes when the date format is not US (for details see down page). To run the installer, go to Control Panel, Region, and under Location select United States, and under Format select English (United States). (See below.)
Crashing in Australia
When you select the product ("MySQL Server 5..21 below), the installer crashes with something about a string and datetime error.
While this will probably be fixed, as of October 20134, to work around the bug, go to Region as below (Control Panel); change the Location to United States, then the Format to English (United States). Click Apply to keep the Window open, so you can easily change it back when done.