One wanted help uninstalling Norton antivirus, the other needed assistance with a Window 7 problem.
Both did a Google search for the relevant support and up popped a paid listing for a company called Guru Aid who offered the relevant support and a toll free (0800) number.
On entry to the site one is offered "independent technical support" but I suspect people don't actually notice this as they think they've come through to the official site for Mcafee, Microsoft, Norton or whoever.
Both clients experienced problems afterwards.
I am continuing my investigation but strongly recommend that you do NOT use this company.