computer/properties

[Vinny Ray]

I right click on computer and select properties. On the permissions tab 
it says I cant make any changes because I am not the owner. So I am just 
wondering who owns my computer?
You do not have permission, no administrator rights, unauthorised access 
etc.... is why I deleted windows off of my system.
How can I fix this?
I also see that I need to type in my password every time I install 
something..
Surely Linux has a fix for these problems?