Download it here:Download VirtualBox
Make sure you download the windows version!
To do this you need to make a new virtual machine. Click the new button in virtualbox.
Type in a name i'm going to use "checkra1n" but it can be anything.
Change the type to Linux
Then version to Other Linux (64-bit) (if you used the 64 bit iso)
Change the memory to 1024 MB
Click the create button then next. and then next again. and then click create again!
Then once that is done click the Settings button.
Move to Storage and then click on the disk that says empty.
Then click on the little disk with the arrow next to it. Then click "Choose a disk file..." then select where you saved your odysseyn1x iso.
If it asks you for a start up disk make sure in the drop down it is set to your iso.
Wait for it to load.
Connect your iDevice into your Computer.
Then in the top of the virtual box window you should see files, machine, view, input, devices, help.
Click on devices.
Then on USB then select something like "Apple iPhone"
Make sure your phone is on and you trust the Virtual Machine.
Then click on Checkra1n And follow the steps!
You are done! Enjoy Jailbreaking!