Look for a line in the file containing mscdex.exe and delete everything up to it, so that the line begins with mscdex.exe. (You can remove all subsequent lines from the file, too.) Save the file.
It is spread when the infected USB device is inserted into a Microsoft Windows workstation or server whereby the setup.exe and autorun.ini files run automatically.
Their observational study was conducted with data from asymptomatic patients with a history of PCI or CABG who were referred for ExE at the Cleveland Clinic from January 2000 through November 2010.
The other waste of space is the Office Startup applet (called OSA.exe), which helps Office apps start a tiny bit faster, but not so much that it's worth the RAM it consumes.