Installer erroneously claims "all products up to date"

Problem

1. In VisualStudio, click notification for an update of ReSharper.
2. ReSharper Update dialog tells what updates are available, and that the license can be used with the new update. Press on "Install the update".
3. Updater starts and after a moment tells that all products were up to date.
4. The same problem with updating using ReSharper | Help | Check for updates.

Cause [Optional]

Possible reasons:

• installer could not find any Visual Studio instances installed on the PC;
• the installer did not recognize the product as an installed because of semi-uninstalled state;
• all products are installed for some user, but it is not the current user.

Resolution

• Reinstall the product;
• Try to install/remove a Visual Studio workload or component using Visual Studio Installer.
• If nothing helps, collect installation log files from %LocalAppData%\JetBrains\Shared\vAny\Installer and contact the support team.