I know rootkits can be pretty nasty to remove. I've never seen this particular one, but I googled it (as I would if you were to bring your computer to me).
I found a thread on forums.techguy.org that has a ridiculously long discussion and troubleshooting session on it.
The most promising part of the thread seems to be a link to a program called
gmer.net. It appears that a better known scanner called
Avast contains the same anti-rootkit technology.
I'd try to remove it with the free version of Avast.
If that doesn't work, I'd try malwarebytes.
Then, I'd look into this gmer.net rootkit removal tool.