Got a call from Mike Brown, said:  He is from Microsoft Windows and  my computer is registered with them and it sends them messages that I had  malware in my computer and it was spreading each time I opened my PC. Once some one lets them acces to their computer, they download all kinds off programs and charge you for a warranty. They steal everything,
Your contact poeple and than start calling them.

I got the same call from them today. They said they were calling from Microsoft Windows Security Center.  I played stupid as they told me all about how malicious software can infect my computer and from the information they were getting about my computer it would crash within days and I would lose everything and my computer would be useless.  I of course would not let them access my computer remotely and asked for a number where I could call them after I talked it over with my husband.  It came up unknown number on my caller ID. Beware of anyone looking for access to your computer. Not only can they take the information you have there along with your contacts but they can also get information that you enter in the future including passwords and banking information.

Tried to pass themselves off as the Law Enforcement part of the IRS demanding a call back to an Officer by the person they called or that person's lawer  about unpaid taxes.