System Tool 2011 - Virus Warning (Related to Hotmail Adverts)
I'm sure some of you maybe of seen it already, but take a look at the screenshots below...
The only way we've been able to remove the virus use the Malwarebytes' Tool. The instructions in the forum post below work 100%. The tool needs to be run in the user account it's hijacked. However, we've seen one computer corrupt itself as the virus had time to completely ruin the boot-up and then we had to rebuild it from scratch.
Removal instructions for System Tool - Malwarebytes Forum
We've blocked the hotmail website as a precaution so far to stop any further infections. It might be worth warning staff who have home computers that could be at risk. Unfortunately, it's bypassed Sophos Anti-Virus (due to the nature of how the virus renames itself everytime it excutes after a reboot) and it cannot be detected outside of the user account it's hijacked.