Can gparted fix my NTFS MBR?

I had previously used gparted to make some new partitions and install linux. Now I need to delete those partitions and fix my MBR. I heard about the Windows fixmbr utility, but I can't get to it because my Windows installation is asking me for an administrator password. This system came from Dell, so I have no idea what they used as a password.

So, I need a way to fix my MBR. I plan on using gparted to delete the old partitions and fold them back into my second NTFS partition, but can gparted also rewrite my Windows MBR?

If not, do any of you know of a utility that can?

Thanks!
John