We checked up the file BPKUN.EXE and found it hazardous.
The file BPKUN.EXE must be deleted from the system immediately.
Kill the process BPKUN.EXE and remove BPKUN.EXE from the Windows startup.

BPKUN.EXE Information and Removal:
BPKUN.EXE is known as: Spyware.Perfect!sd6 [PCTools] Spyware.Perfect [Symantec] not-a-virus:Monitor.Win32.Perflogger.cl [Kaspersky Lab] Keylog-Perfect.gen [McAfee] Mal/Generic-A [Sophos] MonitoringTool:Win32/PerfectKeylogger [Microsoft] Win-Trojan/Perfloger.40960.H [AhnLab].
MD5 of BPKUN.EXE = EA1F8D8E45CF7630F7C00A4A26AAF54D
BPKUN.EXE size is 40960 bytes.
Full path on a computer: %TEMP%\RARSFX0\BPKUN.EXE
Related Files:
%TEMP%\RARSFX0\BPK.CHM
%TEMP%\RARSFX0\BPK.EXE
%TEMP%\RARSFX0\BPKHK.DLL
%TEMP%\RARSFX0\BPKI.DLL
%TEMP%\RARSFX0\BPKR.EXE
%TEMP%\RARSFX0\BPKUN.EXE
%TEMP%\RARSFX0\BPKVW.EXE
%TEMP%\RARSFX0\BPKWB.DLL
%TEMP%\RARSFX0\DOWNLOADS.URL
%TEMP%\RARSFX0\INST.BIN
%TEMP%\RARSFX0\LICENSE.TXT
%TEMP%\RARSFX0\ORDER.URL
%TEMP%\RARSFX0\SETUP.EXE