Man with Indian accent asked to speak to me. When I said please do not call back, he kept asking why. I said I don't respond to spam calls - he asked who said he was spam caller. I said again please do not call back and hung up.
It sounds like this scam:
http://800notes.com/forum/ta-29022e7af5a3050/ ... h-your-computer
The caller talks you into letting him scan your computer for errors. He finds lots of them - because he installed them during the scan. Then he charges you $$$$ to remove them. But he may not remove them. He may keep control of your computer, using it to send spam and torment others.