If you get a call from out of the blue from someone working with Microsoft or some other company you've heard of and they'd like to help you fix your computer, hang up! It's probably a tech support scam. The Federal Trade Commission has this to say about tech support scams:
Tech support scammers want you to believe you have a serious problem with your computer, like a virus. They want you to pay for tech support services you don't need, to fix a problem that doesn’t exist. They often ask you to pay by wiring money, putting money on a gift card, prepaid card or cash reload card, or using a money transfer app because they know those types of payments can be hard to reverse.
Below are some links that will help you avoid scams and help you if you've been scammed.
If you can see this page, you are using an internet browser. Choose one of the tutorials below to learn how to do more with your browser.
There are many factors that might influence you in your choice of browser. These articles are a good starting place for your research.