i knew that would happen, but i tryed it now on another product, with the very same result.
actually i only start, play and it will crash.
When has it started?
With the download of an update of the NexusModManager.
Yes, i have uninstalled it by instructions of the developers. And no, the issue has not been treaten.
Has it happened before?
Yes. When i was playing a onlinegame at Trion Worlds.
How has it been disabled?
by leaving Trion Worlds and uninstalling all and any single currently installed Game on my PC that utilizes a online connection somehow.
And now has it returned?
Yes.
What is it exactly?
Normal experience with operating anything until it appears. A crash of the Motherboard, with the BIOS
posting a message about energy complications/surges.
And before the question comes up, yes, i tryed return to a former game. It will crash again, after a short period of operation.
Anybody?
there is times i enjoy this song http://www.moddb.com/members/joshua-brisco/videos/mercenaries-2-song-oh-no-you-didnt/#5760992

I get that you have problems, but it is hard to find head and tails in what you are saying. A lot of people use Nexus Manager (I do as well) and if there was a bad code in it, it would have been found almost immediately since it operates under GNU which is open source and it wouldn't have been in circulation for long if at all.
Someone talking to your character in an MMO isn't going to infect you with malware. I've seen strange things happen to PCs that seemed to only happen in certain games that turned out to be PSU or memory issues. I've even seen cases of random crashes being caused by inconsistent power coming from the outlet in a user's house. You really can't rule out a hardware or external problem until you've done some troubleshooting. I know that it seems like you're observing a software or game-related pattern, but more often than not, patterns like the one you're describing are just a coincidence.