Ctrl + Alt + T should open a terminal window.

sudo fdisk -l

This will list all available partitions.

Sample output*:

Disk /dev/sda: 298.1 GiB, 320072933376 bytes, 625142448 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x877d3b07

Device Boot Start End Sectors Size Id Type
/dev/sda1 2048 2099199 2097152 1G 83 Linux
/dev/sda4 2099200 625139711 623040512 297.1G 5 Extended
/dev/sda5 2101248 33558527 31457280 15G 83 Linux
/dev/sda6 33560576 54534143 20973568 10G 83 Linux
/dev/sda7 54536192 75509759 20973568 10G 83 Linux
/dev/sda8 75511808 85278719 9766912 4.7G 82 Linux swap / Solaris
/dev/sda9 85280768 625137663 539856896 257.4G 83 Linux


See if there are two of type NTFS. If they are not there, then Windows is gone. If they are, but not the same /dev/sd?? as the Linux partitions, then something is still interfering with the boot process and is launching Mint off a different drive.

If everything is on the same device, run

sudo update-grub2

to redetect other operating systems. That should add Windows to the boot menu.


* Use the source, Luke... The forum software escapes the PRE tags and then proceeds to mangle the table. You can see the nice one under View Source.