High CPU Usage 3com Driver Fix

By: HCRWarrenAR
July 24, 2012

I wanted to share this for anyone who has run into high CPU usage.

I received a Dell Precision M50 Laptop with 1.8 Ghz, 1gig Ram with a new install of Windows XP Pro with all Service Pack 3 updates. The sound  was sluggish and cutting out. I checked the task manager performance and the CPU usage was fluctuating between 50% & 100% at idle and the system process was 50+ all other processes were 00.

I did not know prior to this what had been done to this laptop. I investigated further by going to http://technet.microsoft.com/en-us/sysinternals/bb896653 and downloading process explorer to see exactly what thread was causing this. I found that the 3com network driver was the culprit so I rolled back the driver that had been updated after the install and updates by whoever did the install.

This repaired the problem and CPU usage dropped to 1-2% at idle and the sound and video play back worked fine. I spent an hour checking for hardware issues, etc prior to this,lol. I hope this helps someone.

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