Update procedure in Windows primary OS consists of the following steps:
We recommend that you use the auto-update feature incorporated into Parallels Workstation to be informed when new update is available. Auto-update feature regularly checks the Parallels server and informs when the update is found. See Auto-Updating Parallels Workstation in Windows.
Instead you may check for new updates using Update Wizard or manually on Parallels site.
There are two ways to download an update:
If you use the auto-update feature, it informs you when the update is available and launches the Parallels Update Wizard for downloading. If you do not use the auto-update feature, you are able to start Parallels Update Wizard manually. See Update Wizard in Windows.
After you download the update using Update Wizard, the latter automatically launches the Setup Wizard for installation.
If you have downloaded the update manually, perform an ordinary Parallels Workstation installation. See Parallels Workstation for Windows: Step-by-Step Installation.