Beware of FastHeal.Net Scam

I just received a phone call from "tech support" and the guy told me that my computer was sending out error messages and that I needed to immediately follow his directions.  I asked repeatedly who he was with and he said "Windows" and started yelling.  I was to go to the run command and type in 'iexplore www . fastheal . net'.  Very abusive and certainly not trustworthy.  I just wrote down the command he wanted me to run.  He yelled that I was just wasting his time.  I hung up on him.  I, instead, looked up the web address and they are wanting you to install a bit of software that will infect your system and then demand money to fix it.  Just beware. I found that this scam has been going on for a few years.  I'm just a bit surprised that it hasn't been posted in this forum yet.