I have no idea who they are, they never leave a message they just keep calling.

I kept getting calls from this number.  I finally answered, because they never left a message.  They said they were calling about my Windows computer.  This sounds like a scam.  They call and tell you they are a Microsoft certified technician and then ask you a bunch questions that ultimately is what they need to get into your computer and steal everything.

Now it is an IRS scam threatening that you are late on your taxes and they want you to pay them.

Now it's an IRS scam saying you are late on your taxes and they want you to pay them. Guy has a British accent.

I received a call indicating that there was a warrant call back and got no response