Recently T324 Technology Associates have received quite a few calls about an overseas company that calls people on the phone and pretends to be Microsoft, offering tech support or reporting a problem.
The company obtains administrator status on on the mark's computer, then removes the rights of users and charges as much as $300/yr to "provide support"- which, of course, they don't actually do.
This scam was reported on in 2010, but clearly hasn't gone away!
A new client called us while the overseas company was actually accessing her computer, and our associate told her to shut down her computer immediately! Her data security was protected, a significant issue especially because she handles confidential information. Remember, you will never receive an unsolicited call from Microsoft offering a "service contract", "tech support" or "security update"-if you get a call like that, just hang up!