Caller advised they were from Telstra Technical Services and my internet service was about to be shut down for 10 days and they had sent messages to my Computer Management Page, but as I was a basic user, perhaps I had overlooked them.

She explained there had been an online virus in my postcode and I was at risk.

I said this was a strange scam and she said she would prove it was real by taking me to my computer's management page and I could check my Customer Licence Service ID number, which would prove it to me.
She guided me to Windows Run prompt and asked me to type "assoc" then when C:/ users prompt appeared in a DOS window to type "eventvwr". Windows Event Viewer loaded and she read out to me my CLSID number which appeared at the bottom of the scrolled data. I suspect everyone has the same number in their set-up. Mine started with 888DC and ended with 7D062.

By this time, I had searched online through the ACCC Scamwatch and found Windows Event Viewer mentioned in a 2011 post and told the caller it is a scam which would result in my being sold virus protection software or support. She protested I hadn't seen what viruses I had been exposed to yet and I hung up far too politely.

I missed the called, when I called the number back (soon after) a message said the number is “not in service” ... can only guess it to be a scam caller.

Rung twice. Didn’t know I had a call as phone was on charge. Rung back and said the number was out of service. So it said. Be careful not to fall for any scams. I can only hope or figure it was a scam.

Caller: Telstra Support (so they say)

Same " type "assoc" then when C:/ users prompt appeared in a DOS window to type "eventvwr". Windows Event Viewer loaded and she read out to me my CLSID number which appeared at the bottom of the scrolled data. I suspect everyone has the same number in their set-up. Mine started with 888DC and ended with 7D062." script as Claire
But these people stated they are Telstra support a search of the web found they are mainly Indian scammers pro porting to be from BT, Telstra etc