After upgrading to Windows 8.1, you may find your Windows Home Server dashboard no longer works. The solution for me was:

  1. Uninstall the connector.
  2. Open a command prompt and run ipconfig /flushdns.
  3. Reinstall the connector by going to http://[WHSname]/connect.

However, in my case I would get an error “Cannot connect the computer to the server because either another software installation is in progress or, the computer has a restart pending….”

Try restarting. If that doesn't solve the problem, a registry key needs to be deleted.

http://social.microsoft.com/Forums/en-US/a90b4679-d2dc-4820-94f0-dce22da245a4/solved-cannot-install-connector-software-error-regarding-another-installation-is-in-progress?forum=whsvailbeta

Summary:

  1. Open regedit.exe.
  2. Navigate to
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager
  3. Delete the key PendingFileRenameOperations