It is a SCAM !!!!  I got the call. Could not understand a word he was saying, VERY heavy Indian accent - he was getting very frustrated with me saying that I knew where the computer block was on my computer ---- ah, I was playing with him trying to get more info out of him as he was acting very strange and not answering any of my questions.  I am definitely not computer illiterate with a Masters Degree in Information Systems Management concentrating on Security.  I said to him that this was a scam and he yelled back no it was not.  So I played a long a bit longer.  Opened the Event Viewer and he told him that I had about 11 thousand events.  He said in astonishment "oh my gosh... this is not good, let me get my technician"....  Another gentlemen got on the phone, with less of an accent, sort of, and said this was bad. I proceeded to  ask him what the heck they were talking about, and he said again that they were commissioned by Microsoft to find computers that were infecting the internet.  I told him that we have a secure setup with very good virus protection with our ISPs and very secure firewalls etc.  He just was not buying it.  I then asked him for his IP address so I could block him.  He said that I could not do that.... I just smiled to myself.  I then said I had to leave right away for a meeting, he said he would call back later, I said no, please give me their number and I would call them.  He gave me his name of Anthony Brown at 720-452-0274, and asked me to repeat it.  I then asked he - bottom line, what is the catch - what is the cost?  He said it depends on how much was wrong with my system and how many files were infected.  I then said - I will call when I can if at all.  He then proceeded to call me back at 4:30pm and called himself Michael.  I then told him to never call here again.

this guy was very annoying and wanted  to fix my computer saying he was from windows, and kept insisting on me to follow his instructions and to give him information,  i knew he was no from there after he asked me for my Facebook name. which then after i started to waste his time by keeping him on the line as much as possible, then hung up. he had a stupid accent which he got frustrated because i didn't know what the f**** he was saying it was funny he got mad after a while.

Just yesterday bought and downloaded a malware cleaner and protecter.  Today I got a call from that # claiming to be from Microsoft Windows.  I told them I know they are a scam and hung up.  They must be upset that their bug has been killed.

As someone said below, the caller told me he wanted to help me with my Windows machine.
I asked several times if he was from Microsoft and he eventually mentioned a company name, but I forgot what it was.
I kept him on the phone for a while and even told him I didn't trust him, but he was persistent. He wanted me to open up my EVENT VIEWER hoping that I would be alarmed by all of the warnings there (which I've read is normal). He even tried to reassure me that I could unplug my modem while I did this, but I assume that if I found something HE thought was dangerous to my computer, he would have had me plug it back in. Finally I told him I'd write down the instructions and call my ISP or my virus protection company if I found the "DNS errors" he was trying to scare me about. He got frustrated and told me to call Microsoft then hung up.

This number calls everyday. Never anyone on the line then a recording says "goodbye"! It's driving me nuts!!

Just got a call from this guy... Claimed to be from Windows support services in Denver....near as I can tell the 702 area code is in Nevada. He wanted me to hook up to his computer.... gotta be a scammer. I kept him on the line for about 15 minutes to get as much info as possible but that was it.

Person told me they were calling about my windows computer.  When I told them I don't use windows & I have a MAC, they hung up.

Heard the tell-tale "beep" of being recorded and after I said hello a couple of times, I heard a recorded "goodbye" in response.

I have received many calls from this number it the last couple of weeks.  Never leaves a voicemail.  I don't answer calls from numbers I don't know.  I do wish they would stop

only calls does not speak.    Just keeps calling, calling, calling!!!!!!!!!

Yup I just got a call too ignored! And blocked

Just received a call from this number in Las Vegas.  Didn't leave a message and I'm assuming it's a telemarketer.  Caller blocked.