I ran X-setup and found several dozens of this line, each slightly different. The lines aren't between the two programs where the gap is but rather at the beginning of all the Add or Remove list. The words (No display name) preceed them all. What do you suspect they all are? Looks to me like some kind of install shield that didn't clean itself up very well. Would it be safe to remove them all?
(No display name) RunDll32 C:\PROGRA~1\COMMON~1\INSTAL~1\engine\6\INTEL3~1\Ctor.dll,LaunchSetup "C:\Program Files\InstallShield Installation Information\{EE6699B3-E5AD-4E59-8F2B-207DF630670C}\setup.exe" -l0x9 /remove
Notice the word remove at the end. Some have removeonly