I expect you let the installer resize the windows partition?
I always change windows partitions using windows system tools.
by using windows to change windows partitions you are sure that windows will know what has happened to the partitions.
I would not be surprised if windows still thinks that its partition is still the same size and can not find the end of the partition.
so you may be able to boot off the live cd and use gparted to delete the linux partitions and then extend the windows partition back to its original size.
but then you will have to use your windows install disk to restore/repair the windows installer to the mbr.
then if windows boots you could resize the windows partition and leave the rest of the disk free.
now reinstall mint to the unused area.
if there is really bad mojo you may have to reinstall windows or try to repair it.
remember to leave half of your disk free to install mint.
sorry for the bad news.