In my computer slot it says I have 128 TB of 135 TB
Just out of curiosity, where are you seeing that?
If you click the Start button in the lower left of your computer screen and then click where it says Computer, you should be able to find how much space is on your hard drive. For most people it would be in the GB range, but it might be between 1 and 2 TB if you have a lot of disk space. I think you may have mistaken 1.28 TB for 128 TB.
None of which helps with RHEM 4, but installing the correct version of QuickTime might, since their webpage mentions QuickTime.