It's fairly certain that installdatemanager.exe is malware, adware, or a virus of some type. This file, and possibly others, are running in the background on your system. Deleting these files quickly is very important.

Adware.W32.Claria is a type of malware, and installdatemanager is linked to it. Since viruses and important files can have the same names, it is essential that you backup your system before deleting files indiscriminately.

To be sure that you are not removing important files, use Computer Associates's free scan of your system.

Since installdatemanager.exe has been found on your system, there is a good chance that more malware is lurking. Get a free scan of your system by clicking this link.