The first thing I did to speed up PS 4,5 and 6 was to delete or move fonts out of the system folder. My trial version of PS CC simply says "don't show" in the system folder when I try to delete unwanted fonts installed with the application.
I've had "Font Folio" for many years so I don't need or want fonts. I have a Win7 64bit PC, 8-core, 32gb ram system. Deleting fonts and brushes sped things up considerably. I also still have PS6 installed because I'm not sure I want to keep the CC version. Can I delete fonts in CC or not?
If PS is Photoshop, you might ask in that forum
This forum is actually about the Cloud, not about using individual programs
Once your program downloads and installs with no errors, you need the program forum
If you start at the Forums Index http://forums.adobe.com/index.jspa
You will be able to select a forum for the specific Adobe product(s) you use
Click the "down arrow" symbol on the right (where it says ALL FORUMS) to open the drop down list and scroll