Is the file ARQUIVO6.EXE located on your computer? Then your computer is infected.
We do suggest you should remove ARQUIVO6.EXE from your computer as soon as possible.
ARQUIVO6.EXE is Trojan/Backdoor.
Kill the process ARQUIVO6.EXE and remove ARQUIVO6.EXE from the Windows startup.

ARQUIVO6.EXE Information and Removal:
ARQUIVO6.EXE is known as: Backdoor.Rbot [Ikarus] packed with PELock [Kaspersky Lab].
MD5 of ARQUIVO6.EXE = 5C79689D50315B8CD7F024348A593BFF
ARQUIVO6.EXE size is 105984 bytes.
Full path on a computer: %SYSTEM%\ARQUIVO6.EXE
Related Files:
%SYSTEM%\ARQUIVO1.EXE
%SYSTEM%\ARQUIVO2.EXE
%SYSTEM%\ARQUIVO3.EXE
%SYSTEM%\ARQUIVO4.EXE
%SYSTEM%\ARQUIVO5.EXE
%SYSTEM%\ARQUIVO6.EXE