dllhost.exe - High CPU Usage

I was getting high CPU usage from dllhost.exe recently.  I noticed it when my laptop's battery started draining unusually quickly.  After trying several things, I logged on as a different user, and the problem went away.  So I backed up my documents and settings, blew away my profile, and logged back in.  Problem solved.

Or so I thought.  After restoring all of my documents, the problem came back.

I discovered it was Windows, trying to index a corrupted video file that was on my desktop.  I deleted the corrupted video file, and my CPU usage returned to normal.