the workstation is part of a windows 2003 domain and is located locally to the server. Last week, when the user tried to open an email, she receive a login popup diaglog box asking her to input her login credentials. thinking that it was just a different application so she didnt bother contacting the IT people until today when she opened the email related to the one of last week. The weird thing is that it only pops up on this email. We are suspecting of malware. Can anybody enlighten me on how will i detect/remove this? i tried running Malwarebytes and it found a few and cleaned it. but still the same situation is happening when she opens the message. I appreciate the help. thanks.