QuickTime comes from Apple, not Adobe.
Adobe makes Adobe Reader and Flash. There have been updates for Adobe products, and unless you uncheck the option during the install you may end up with something you don't want, like a demo of McAfee or an unwanted toolbar. But Adobe does not make QuickTime.
If you have a restore point, you might try a system restore, going back to a point before your computer started acting strange. But if your computer is infected with malware that's causing the weird behavior, you may have to do a reinstall, like your son says.
If you have Vista or Win7, here's a site that tells how to use System Restore:
***Using Windows 7 or Vista System Restore******Using System Restore in XP***If that doesn't help, or makes things worse, consider a reformat.