Shrink Ubuntu and expand Vista partitions

[x C0MMAND0 x]

Hello,

So when I installed 8.1 I made Vista only about 30gb and Ubuntu about 270gb.

Now, (please don't ask why, for it is not important), I need to expand the Vista partition to about 150gb. How do I shrink the Ubuntu partition WITHOUT losing any data? Then I should be able to just extend the Vista partition I'm guessing.

Is there a way to do this without losing data, or do I have to just do a FULL backup and uninstall Ubuntu?

Thank you very much for your help, and Merry Christmas!

[logos34]

No need to reinstall. Use Gparted on the ubuntu live cd to shrink ubuntu. Back up your files to be safe.

Use Vista's own disk utility to grow vista--don't use gparted.