I'm about results, I'm not going to write a dissertation between the 3rd
party apps and M$'s one that doesn't work well enough.
I gave an alternative to diskmgmt.msc that all the MS-boobs were simply
not offering. Maybe you should explain that before defending MS's
horrible, half-ass tool.
<Inserts tongue in cheek> First, they defend diskmgmt.msc because of
FUD. Because the third party tool isn't part of Windows, it's possibly
going to do horrible things to your HD. The Windows tool, on the other
hand is guaranteed bug free, and does all that any sane user would
require. I see that all the MS tool names conform to the 8.3 filename
convention, too, which may tell you how far back in history they go.
<Puts tongue back in normal position>
Meanwhile, in the real world...
EaseUS partition manager is good, as are many other free partition
managers. GParted live CD is excellent for resizing partitions without
damage, and doesn't require you to install anything.