Infected with SecurityTool

So I'm trying to fix my friend's computer. It turns out she's infected with the SecurityTool malware. I've removed malware for a bunch of my friends in the past but this one is by far the most entrenched I've seen. I looked at the bleepingcomputer guide to removing SecurityTool but to no avail. Here's what I've tried already:

I ran rkill but SecurityTool prevents it from loading. I tried to follow the advice given on the bleepingcomputer guide that says that I should ignore attempts by securitytool in blocking rkill. I ran rkill about 20 times but every single time SecurityTool is able to interject and stop the rkill process. I've also tried loading MalwareBytes, ComboFix, IBProcMan, Killbox and Procexp. SecurityTool prevented all of those programs from loading.

I'm also unable to boot in safe mode. After safe mode loads, I see the mouse pointed but before i see the desktop, my computer restarts.

Any suggestions?
Thanks

EDIT: I guess I should also add that I'm running Vista

Edited by pinkfloyd99, 04 May 2010 - 03:39 PM.

OK so I was able to finally load rkill and install malwarebytes. I will go forward with removing this damn malware.

To anyone who is going through the same problem, what I did was I put rkill in the Startup folder. To find your Startup folder, click on the Start button, under applications find the Startup folder. Right click on the Startup folder and click on Explore. Once you're in the Startup folder just put rkill in the directory and restart. When Windows restarts, it runs rkill and stops the SecurityTool process.

Hope this helps someone.

Edited by Budapest, 04 May 2010 - 04:59 PM.
Moved from Virus, Trojan, Spyware, and Malware Removal Logs ~BP