Yes, that was the first thing I did. After undoing the change didn't work I've tried uninstalling and reinstalling just After Effects and Premiere, then I tried reinstalling the entire suite, then I removed the suite using the Adobe Creative Suite Cleaner Tool and reinstalled it. None of this has worked. Even the freshly installed program gives me the same error.
I've defragged and wiped the free space on the drive. I've run AVG, Malware Bytes, Spybot S&D, and Spinrite.
I've reinstalled Quicktime, uninstalled all third party programs like DivX, reinstalled my graphics driver and updated it, and I've done a Windows Update.
The only thing left I can think of is reinstalling my operating system, but I would need to find my Windows disks and I don't have a HDD to backup everything in order to do that. I've looked into buying another hard drive but I can't afford it right now. I'm hoping there is a way to fix this without it coming to that.