Alright. Do you think it would hurt my system to delete these folders? And also, why is it that, even though I am an administrator, it required me to specify permission for each folder and file? Thanks for the answer, though!
Yeah, those are hash tags for some software install, where it cached some needed files in your drive for use later in the install. They're safe to delete. It's not uncommon to see Windows Update create them, and numerous other Microsoft softwares do also.