I'm having trouble with this "Software Updater" in a couple of windows machines, which has malware-like behaviour. I kill the process, run an "oficial" uninstaller, delete the folders and still it comes back again after reboot.
I don't know really how it got installed, I think it is part of the InstallShield stuff and installed with another software.
It is installed in "Documents and Settings\All Users\Application Data\Macrovision" and I think it installs also on "Documents and Settings\\Application Data\Macrovision".
The processes are named "agent.exe" and "ISUSPM.exe".