Good thing you hung up because this is a scam. They want to gain remote access to "show" you all the errors that "indicate a virus" then lock your computer so you cannot use it so they can extort money from you to "fix" it. They will also likely disable your security software and install malware that lets them access your computer any time you are on line and record your userids, passwords, credit card numbers, banking information and anything else they can get their hands on to rob you blind.