Got a call from this number to open Windows that he can download...
very suspicious..

never do it!

It appeared as a missed call on the display of my phone

Same here, in Lugano! Called 1 time this morning saing that she was from Microsoft, i sayd that i had pc broked and to not call back.

I had 4 more calls the next hour.

A woman named GeeGee with a relatively strong Indian accent
She asked me to follow her instructions claiming my windows-based computers had viruses and needed protection.
After I asked her for her full name, company name and website, she pressured me to follow instruction, gave evasive ansswers and eventually hung up on me.
She had a sense of urgency in her voice and was demanding that I follow her instructions.
When I asked about the company she works for she claimed it was an international company with offices 'all over'. Then she said it was based out of the UK. When I asked if she is in the UK, she would not answer.
I asked her if she was claiming to work for Microsoft. She said 'No, it is a 'Windows Service Company". But she would not give an actual company name or website.
The intent of this call was fraud in my opinion.

I received I call today and the lady told me I have viruses on my my Window computer. I answered I have a Mac and she insisted that somebody from my home was using a virus infected computer. I told her it was not possible and then she hang up.