Those two files are suspect.
In my AI 12 (CS2) installation, there is only one scripting support plug-in file: ScriptingSupport.aip. It is located in the [program installation folder]\Plug-ins\Extensions folder.
If those two files (ScriptingSupport(2).aip and ScriptingSupport(3).aip) are in the same folder, I would just pull them off to your desktop. If, then, Illustrator starts up OK, and everything checks out, you can trash them.
The question, of course, would be how they got there in the first place. Numbered files like that usually indicate multiple attemps to create them -- perhaps from multiple abortive re-installation attempts.
There might be other issues (e.g. permissions-related). See these other previous discussions (although, unfortunately many of the contained links no longer work in these horrible new forums):
I a gree with Harron. Simply delete them/ move them out of the way. In addition to bad installs, they may actually be recovered files from Windows itself, restored after crashes. To avoid that, check your system restore options and crash reporting. Either exclude certain directories/ programs, reduce the intervals or the reserved disk space for fiel recovery.
I removed those two files. Illustrator opened but no tools were available or worked. Open or new wouldn't work either. I noticed there were other files numbered (2) and (3). I removed them as well. Still not working.
I wonder. I have reinstall this 2 or 3 times trying to get it to work. At one point in the reinstall, I'm asked if I want to save my settings. It recommends to same setting if I'm reinstalling on same computer. Should I reinstall again and not save settings?
I would try it since it si not working but before reinstalling you should trash the settings folder if you are on a pc I do not know where that is located, someone else will have to direct you.
I noticed there were other files numbered (2) and (3).
Another possible reason these exist is multiple installations under different users (logons).
At this point, I can only suggest a thorough uninstall followed by a reinstall.
See the following knowledgebase articles: