[H] File ownership in Win7 -- pissing me off

[Anthony Q. Martin]

I now have all my work systems using Windows 7.  Yet, when I move my USB 
HD between them, I keep getting ownership issues when I open my files. 
This pisses me off because I forget that the file opened read-only 
(actually, I usually don't notice it) and when I go to save it, I have 
to change the filename.  I can fix it by using properties on a given 
file so I can write over it next time, but dammit...I need this to go 
away forever.

How does one fix this once and for all?  And am I the only one dealing 
with this?  Why hasn't MS fixed this in an update?