The executable file for the APO Access Service process is AESTSrexe. The program that runs is Andrea ST Filters Service with the name. APO Access Service (bit) › AERTSrexe and its shared referenced files. Corrupt download or incomplete installation of APO Access Service (bit) software. .. Description: Andrea filters APO access service (bit). Click here to know if AESTSr64 is safe and how to avoid AESTSrexe errors. The process known as Andrea filters APO access service (version (bit)). aestsrexe's description is "Andrea filters APO access service (bit)". aestsrexe is digitally signed by Microsoft Windows Hardware Compatibility.