Access is denied hell! No suggestions have worked

I have a on my home network (in a normal old style , not ) that i only get "Access is denied" for when I try to access the folders in it.
I have tried to take ownership of it, but I only get access is denied.
Whatever I click on when it comes to for it it gives access denied if I try to change a setting.
I have downloaded the fix which is supposed to grant access denied by a right click, but of course it doesn't work.
I have tried to switch to be a net admin in the prompt, but the exact command line that is written in some forums just that the user doesn't exist.
I then tried to turn of UAC totally on both computers, but I have still got the same problem (which is really strange since I it would have meant that I would get access to everything.
So, what is this complete piece of crap with seven not letting me use the files. Is this supposed to raise security when I turn UAC off (and for a while also all firewalls and all the other settings)
I think this part of Windows 7 (file sharing) must be among the worst things has done in history.
Even Microsoft Bob is forgiven when compared to this.
And reading by the post in different forums I don't seem to be alone. There are numerous threads where the issue isn't resolved for many users, even if they try just about everything!

Thanks Doc Brown for posting all , but these are just basic things.
I have finally got it to work (but not sure really why).
The permissions were set to everyone (for the shared hard drive) , exactly as it was for the other hard drives where it already worked.
I also added permissions for system and administrators (just for the hell of it) and now the hard drive on that computer started to go through all setting the permissions.
Then it hit me that it hadn't done that before when I try to change the permissions.
Maybe it was the permissions for "system" that made it "wake up".
Now I could change the permissions on the other computer so that I could access that hard drive (and its ).
But everything still had to be done with UAC turned off, which is a shame.
Wasn't 7 supposed to be better at networking than previous versions of windows.
XP had the best of the lot I think.