Microsoft error scam. If you see a message on your PC telling you to call this number because of a PC error, restart your PC immediately to prevent malware. Never, ever call telephone numbers related to errors. They are all a scam. Also, if you are called from this number and many others telling you that your PC is sending errors, it's all a scam. They will attempt to get personal info and money and for you to give them access to your PC. I am an IT professional. Never respond to any of these.