Meaning of AGTEXE16 in English
Essentially this task provides the same Alt+Left-click feature as AGTSERV below, but for older 16-bit Windows programs, of which there are still quite a few out there (and some are a mixture of both 32-bit and 16-bit code). This task is installed by the Atomica software on Windows 9x/ME systems only. If 32-bit and 16-bit are technical terms that mean nothing to you, simply continue on to the "Recommendation" section below.
You could try disabling it with Starter if you find that you never have an instance when Alt+Left-click does not work, then you do not have 16-bit or 32-bit/16-bit programs where you need the Alt+Left-click facility and you can leave AGTEXE16 disabled, otherwise simply re-enable it.
Microsoft Windows task list Programs English glossary. Английский словарь - Список целевых программ Microsoft Windows. 2012