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Archive for May 14th, 2012

Troubleshooting Excessive Interrupts & DPCs

Posted by William Diaz on May 14, 2012


After logging onto my main home PC and opening IE, I noticed lag while repositioning the window around the screen. I opened the Task Manager, sorted by the CPU column and saw no single process reporting excessive usage:
image
Nor was the hard disk light blinking or solid. However, looking at the Performance tab revealed two of the CPU cores hovering around 100%:

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