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The file HDAUDIO.EXE is malware related.
You must delete the file HDAUDIO.EXE immediately!
Delete the file HDAUDIO.EXE without delay!
Kill the process HDAUDIO.EXE and remove HDAUDIO.EXE from the Windows startup.
HDAUDIO.EXE Information and Removal:
%SYSTEMDRIVE%AUTORUN.INF
%SYSTEMDRIVE%USBFLASH.EXE
%WINDIR%\HDAUDIO.EXE