Vista Ultimate 64 bit here. Quad Core 2.4 GHz, 8GB ram (I do video and graphics editing and multitrack hard-disk recording ... plus play a couple games :bigsmile:)
All 4 processors, 0% utlization. (I had turned indexing off)
Open Explorer window ... spike, then back near zero.
Open a folder ... just about any folder:
At least two of my processors moved to 40, 50, 60, 70, then 80% utilization.
(average overall CPU, 40% to 50%)
Click in a specific folder, sometimes it would stop. It seemed to be most prevalent when I rolled up a set of subfolders or hovered over one about to open it.
This worked for me, 100% verifiable.
I'd searched all over ... registry entries, avi file searches, etc, to no avail.
Used this Procmon.exe. Sure there were lots of processes. But, suddenly it escalated 10 or 20-fold. At least two of my processors moved to 40, 50, 60, 70, then 80% utilization. I scrolled to bottom (latest entries) and scanned thru list to see that over an over three files continually coming up as not found.
In this folder:
I had three shortcuts in there:
I'm not sure how I inadvertently created these Network shortcuts ... and I haven't researched how this folder is legitimately used or what I may have done wrong there. All I know is this:
Take these shortcuts out, CPU utilization goes to zero (or 1% to 2% with indexing on)
Put them back in, problem recurs (this is repeatable behavior)
I hope my post helps someone.