If you get a call from someone claiming to be part of Microsoft Angels then it is a scam. My mother got a call from someone with a heavy accent claiming to be from Microsoft and that her desktop is giving out error messages. They said they needed to get into the computer in order to fix it.
Obviously, she did know better because she checked with her “computer guy” first. Computer guy meaning her me. I have heard of this scam before but am suprised they are continuing it. Must be enough people falling for it in order to make it worth their while.
If they get access to the computer then they can install whatever they want. Keylogger to find out your passwords. Maybe another program to deliver ads or emails. Yet another program to work with thousands of other infected computers in order to attack a target.
Please be vigilant when online. Whether it is downloading something or the sites you visit. If it sounds to good to be true then it is to good to be true.