Note: See the Uninstalling Solid Works section for updates.
Insure you have backups Backups are an essential element to insure you have protected your data.
This will start the Solid Works Installation Manager and allow you to select versions to uninstall.
If you uninstall Solid Works this way, the Windows Registry and some of the Solid Works installation files (templates, etc.) will still exist.
The practices listed help to insure a clean, consistent update, these processes help to minimize issues and in the long run save time and effort.