I had Linux Ubuntu and Windows dual booting from my computer. I used Gparted to remove the Linux Ubuntu partitions, now I can't get into Windows.
I think it's got something to do with the Linux BootLoader?
If you haven't restored the MBR, then that is probably the cause. There is a complete guide to the whole process at "How To Safely Uninstall Ubuntu From A Dual Boot"
Linux uses GRUB - a chained bootloader which is alos outside 512 bytes of MBR. You choose to install grub on MBR instead of default choice - 1st sector of partition. FreeBSD has bootloader which lets choose boot partitions easily (in 1 sector)