Who called from 3172432445

I keep getting calls from this number saying they are the Microsoft windows security department wanting to 'help' me with my computer.

It's a scammer. Get them too.  Same guy, John, different numbers. Report him.

Keep getting calls from this number and they don't say anything  when u call it back it says it is disconnected

Just got 5 calls within 2 hrs. Say they are Windows Report him to who??

Here are two pages of links to (mostly government) sites in Canada and the USA were you can report phone scams, or learn more about them.

Look here first:
http://800notes.com/arts/I2neMkbUAAo/where-to-report-phone-crime

If the reporting site you wanted is not in the above list, try this one:
http://phonehelp.2truth.com/complaint_sites.html