I want to add something. I run FileHippo after I post that message and between the programs, it found an update for GOM player. When I tried to download the installer for the update, I got a pop-up from AVG notifying that it was a malware, something related to OpenCandy and after looking about it on google, I found that
it will install Conduit Engine. So I deleted the installer and uninstalled the program. I also removed aTubeCatcher and a couple of videos I downloaded using that program the day this problem started because everytime I clicked on them or tried to move them, the dllhost problem happened.
I found that GOM player isn't safe (it was found as a virus/malware by 9 programs) but do you have any info about aTube Catcher having the same problem? While I was looking around I found that some of the people that posted logs, asking for help with the dllhost process, had that program installed. I thought you might find that useful, if you didn't knew it already.
About the process and the screen capture, it was increasing really fast when I made that capture. I had to close it to be able to work. It hasn't appeared sinced then, and I clicked, moved, cut and copied multimedia files trying to see if I would get a reaction like it happened with those videos from aTubeCatcher.
(Sorry for the long response).