Error 5: Access Denied; Can't uninstall/install software

unclenono

Estimable
Jan 4, 2016
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I'm trying to uninstall a program called Guitar Pro and I always get an error message that reads: "File D:\Program Files (x86)\Guitar Pro 6\unins000.dat could not be opened. Cannot uninstall. Error 5: Access is denied."

I'm pretty sure it has something to do with administrative authority or having ownership of the folder, but I don't know much about this type of thing. I've searched a few places and still don't have a good idea of what to do. My account on Windows 10 should be the only one on there, and it's supposed to be the admin. I know I probably haven't listed enough information for a quick fix but I don't know where to go from here. Any help is very appreciated!

[OS = Windows 10 64-bit- - - - moderator]