Today I could help a friend of mine who had the same issues with Photoshop and Indesign (CS6 both).
I found after several trials, restoring the system to an earlier state and back again (image backups),
that the Windows temp file was moved from the user files location to a different one. (Windows 7 ultimate)
After restoring the original temp file (C:\Users\"Username"\AppData\Local\Temp)
Photoshop and Indesign worked fine again, without using admin rights.
Hope this is helpful.
