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The file YA4C34.EXE is malware related.
You must delete the file YA4C34.EXE immediately!
Delete the file YA4C34.EXE without delay!
Kill the process YA4C34.EXE and remove YA4C34.EXE from the Windows startup.
YA4C34.EXE Information and Removal:
MD5 of YA4C34.EXE = D5F767350978EAF35D722E9694F21BFC
YA4C34.EXE size is 204800 bytes.
Full path on a computer: %SYSTEM%\YA4C34.EXE
Related Files:
%TEMP%\VBC.EXE
%SYSTEM%\YA4C34.EXE
%SYSTEM%\YA4C34.INI