Could I use AVG Anti-Virus Personal E-mail Scanner and GetByMail at the same time?
No, GetByMail is not compatible with AVG Anti-Virus Personal E-mail Scanner. Disable AVG Personal E-mail Scanner plugin before running GetByMail or use any other free or commercial antivirus software: avast! (is a free full-featured antivirus package), AntiVir, Sophos, F-Prot, Norton AntiVirus, etc.