A scam call.  You are told that your computer is putting out erroneous signals and wants to charge  you to solve the problem.  apparently "needs" you to reveal passwords and access info in the process.

Received call today from the "Technical Maintenance Dept" telling me that my computer was sending them error reports. Of course the person was an ESL (or third or fourth) and he asked if I was near my computer. Told him no and would need to call him back. Was able to get the above number and then hung up as he repedidly asked me for my number. This is a scam and they will get control of your computer and install trojans and spyware and steal your info.

The caller claimed to be from Microsoft and said they'd gotten error reports from my computer. The man wanted to let his "tecnical support technician" fix my computer for "free" but then I'd have to pay an annual fee to continue support. When I tried to ask questions the "tech" just kept on talking right through my questions (sounds suspiciously like a telemarketer?). When I asked for any type of verification they were in fact from Microsoft the man replied that since he'd gotten error reports from my computer that he must be from Microsoft. I know a scam when I hear it and I heard this one loud and clear.

i received a call from this number telling me that my computer was badly infected.  i did not go on my computer.  man said his name was charlie and his manager was michael lewis.  this needs to stop.

I have been receiving calls from unavailable number and name on caller ID on numerous occasions daily. I got a number today and called back. It is a scam, but they are no longer using Microsoft, but rather saying Windows. He specifically said Windows and told me I needed to listen to him. Said he was calling from Florida.