It's the Windows Installer used to install packages. Download, install, update and run a scan with MBAM click here, delete all it finds. Then, if it doesn't cure the problem, check in msconfig, see if you can spot an entry for it in there or a program that's trying to load at startup. Go to Start > Run and type in:
click OK, then click the Startup tab to see the list of programs that start on Bootup.