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#11
Coolio, there are many reasons we use a 3rd party Disk manager such as to Resize anything to the left, copy, mark active, convert to logical/primary, etc.
We solve many of these problems here every day and couldn't help half of them without the use of a good partition manager like Partition Wizard bootable CD which is preferred because it's free and can be used with 64 or 32 bit.
That said, I prefer Disk Management for simple shrinking since it never fails, while 3rd party partition managers can and do fail during resizing.