When i try to run things for example in the command prompt, it says i have to be an admin to do so, never used to, i was always the only user. Even in the control panel it says i'm an admin, but i c an't access admin features. Any ideas?
When you want to use a command prompt, so a search for cmd, and when the Command prompt app shows up, click in the right pane, Run as Administrator; this is assuming you have not changed the alternate start button from Power shell. As Nemsia said, this is all part of Windows 10 security, even if you are the Administrator and only user.