A client of ours has an SBS2008. We recently noticed that the C Drive running out of space. Our investigations led us to the windows\temp drive filling up with random files. Digging down into these files, we found that it was being cause by a piece of software called Desktop Authority by Script Logic.
The client says they have not installed this software nor do they know where it comes from. After a couple of hours or so trying to remove this software, we have hit a brick wall, even after trying to contact the ScriptLogic support hotline. There's nothing under add/remove programs.
There is a service running called DA Remote Management Maintenance Service, which, if stopped and disabled, after a period of time, say an hour, will have enabled and started itself again. If we remove the program files from the program file directory C:\Program Files\RemoteSupportManager\ - (we cannot delete one of the DLLs at all) and remove references in the registry, everything re-appears after about an hour or so.
Malware scans do not show anything either.