The only way to run VirusScan in Safe Mode is to right-click a file, folder, or a drive in 'Computer' and select "Scan". That would initiate a scan and all you would see is an active icon in the taskbar. Hover over it for a progress report.
The method you describe only applies to the Enterprise versions I believe but am not too sure as they operate differently.
See this document regarding
GetSusp, a tool that McAfee has put out to help in these instances, or look lower down for an independent scanner such as Malwarebytes free, which can be downloaded, updated and run all in 'Safe Mode with Networking'.