Tech Support Scams
It's bad enough when you have to call legitimate tech support for assistance - I work in support, so I know how people are often on the ragged edge by the time they give up and actually call - but when they seemingly start calling you, that's a whole different animal. Some of the latest scams involve getting an unsolicited call from (supposedly) Microsoft or Apple or some other company with name recognition, and then the "support person" will try to baffle you with BS and want to "help" you to "fix" your computer. Note that Microsoft, Apple, Google, Adobe, HP, Dell, Samsung, etc will NOT call people out of the blue to offer assistance, so please realize that up front.
[The scammers] call, claiming to be computer techs associated with well-known companies like Microsoft. They say that they’ve detected viruses or other malware on your computer to trick you into giving them remote access or paying for software you don’t need.
These scammers take advantage of your reasonable concerns about viruses and other threats. They know that computer users have heard time and again that it’s important to install security software. But the purpose behind their elaborate scheme isn’t to protect your computer; it’s to make money.
More details are on the OnGuardOnline site, run by the FTC.