SCAM Anrufe mit CLSID (ClassIdentifier)

Dear all,



I have received yesterday a phone call from a person who claimed to work for Microsoft Security Services in California.



He said that my computer is infected by a virus and constantly sends notifications to the Microsoft Servers. Due to this, Microsoft activities are blocked and interrupted.



He said he needs to fix the problem together with me on my computer.



The person on the phone was an Indian. He was able to tell me my full name and address incl birth date. Additionally, he knew my land line phone number.



In the beginning, I was not sure if it is a fake or real call because the person knew many details about me.



After he was able to tell me a CLSID (ClassIdentifier) from my computer, I was further confused.



I tried to ask for a Microsoft Case ID Number or a call back number because I was not able to figure out if it was a fake call or not.



Once he asked me to download TeamViewer to get control over my laptop, I ended the call.



My question is now:

• How was the person on the phone able to tell me a CLSID Number from my computer?
• Do I have to be concerned that I really have some spyware / virus on my laptop? What can I do against it?

I appreciate your advice!