Erik and Bob take your questions. UK rail lines blocked by unexpected Microsoft Office update. Mobile carrier T-Mobile blocks one billion spam calls. Secret service warns identity thieves are abusing postal mail Informed Delivery scanning service. A Chinese principal is fired after getting caught mining cryptocurrency. A user wonders about the legitimacy of a computer maintenance service purporting to speed up and help maintain your computer for a fee. A Windows 7 user has a problem with disappearing icons in File Explorer. We also discuss how to check for potential malware issues. A SBC Global User e-mail account appears to be sending mail from a Korean e-mail provider.