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

ZXX.SYS Information and Removal:
ZXX.SYS is known as: Koutodoor.gen.l [McAfee] Mal/Koutodoor-A [Sophos] Trojan:Win32/Koutodoor.F [Microsoft] Trojan.WinNT.Koutodoor [Ikarus] Win-Trojan/Koutodoor6.Gen [AhnLab].
MD5 of ZXX.SYS = 5F427C8762B86AB196E476CA11931F8A
ZXX.SYS size is 38048 bytes.
Full path on a computer: %SYSTEM%\DRIVERS\ZXX.SYS
Related Files:
%SYSTEM%\BNQG.DLL
%SYSTEM%\DRIVERS\ZXX.SYS
%SYSTEM%\QIKAMJ.BAT