Some weird stuff running that I can't find info on
 

When I hit Ctrl-Alt-Del, there is some stuff running that I don't know about, but can't get any hits when entered into google or iamnotageek.com. Maybe someone can help me out:

Qoqyenc
Sysnet
Mmwldll

I also occasionally get a box on my task bar called "caswnd" that stays minimized. If you right-click/Maximize it, it says "do not close while test is running".

PLUS I have gotten a few error prompts saying "NSIS ERROR. The installer you are trying to use is corrupted or incomplete..."

AND I am seeing a brief blip of something on the screen now and then, making me think that something is running in the background that I don't want.

I've run Adaware and Spybot and have come up clean...

I have some of the same issues and am eager to hear what people have to say.

sysnet could be part of <a href="http://www.sophos.com/virusinfo/analyses/w32rbotwj.html">W32/Rbot-WJ</a>. I believe it leaves a sysnet process running. If so, not something you want to leave around. Check for the other signs.

Oh, nsis is just a scriptable installer engine so errors would be very context sensitive. Assume you're installing something when it happens?

No, it happens out of the blue (unless some sort of ad/spy/malware is trying to install something without my permission)

As for your first post, I have no idea what it means. Sorry, I'm not terribly up to date when it comes to processes and the like.