The file QO3.EXE is identified as the Trojan Program that is used for stealing bank information and users passwords.
To delete QO3.EXE we suggest you should use UnHackMe:
http://www.unhackme.com

QO3.EXE Information and Removal:
QO3.EXE is known as: Trojan-Spy.Win32.Delf [Ikarus] packed with UPX [Kaspersky Lab].
MD5 of QO3.EXE = 14D00BCB3BE9A3AF3B1971352C80F98C
QO3.EXE size is 336896 bytes.
Full path on a computer: %APPDATA%\QO3.EXE
Related Files:
%APPDATA%\HISTORY.TXT
%APPDATA%\QO1.EXE
%APPDATA%\QO2.EXE
%APPDATA%\QO3.EXE
%APPDATA%\ZS.TXT