Why are some texts larger than others? (Windows 7) Upgrading doesn't work (Windows Vista) Why are some buttons black or missing? (Windows XP) I try to login, and I get the error message "(3) authorization not valid" I try to login, and I get the error message "Access Denied" Why do I get a "Connection error - Channel is busy" message? Book traversal links for Login, connection and compatibility issues ‹ Symantec Endpoint Protection identifies Macaos Enterprise as a virus Up Why are some texts larger than others? (Windows 7) › Printer-friendly version Issues relating to server access, login, updates and system compatibility.