The file MDLCAVS.EXE is malware related.
You must delete the file MDLCAVS.EXE immediately!
Delete the file MDLCAVS.EXE without delay!
Kill the process MDLCAVS.EXE and remove MDLCAVS.EXE from the Windows startup.

MDLCAVS.EXE Information and Removal:
MDLCAVS.EXE is known as: Mal/Behav-374 [Sophos] Trojan-Spy.Win32.Flux [Ikarus].
MD5 of MDLCAVS.EXE = 370B3DD53ABCBBDC693A5F6544DF5C30
MDLCAVS.EXE size is 1270784 bytes.
Full path on a computer: %SYSTEM%\MDLCAVS.EXE
Related Files:
%SYSTEM%\NYET.EXE
%SYSTEM%\BTSTACFWD.DLL
%SYSTEM%\BTSTCFWD.LOG
%SYSTEM%\MDLCAVS.EXE
%SYSTEM%\MDLCFRR.EXE
%SYSTEM%\MDLCLRJ.EXE
%SYSTEM%\MDLCPGN.EXE
%SYSTEM%\MSGRUPD.EXE