Re: removing the dual boot up
Wubi does NOT install to a Linux filesystem partition, but instead, to a file INSIDE an existing Windows partition -- usually the "C:" partition.
Originally Posted by csapty1
If you installed Ubuntu to that partition, and then deleted it, you deleted Windows.
You should boot into Ubuntu using a LiveCD, select Try Ubuntu, and when the desktop comes up, use the "home" icon on the left to launch a file browser and look at the Windows partitions to see of the files are still there.
Ubuntu 16.04 Mate, Mint 17.3; MS Win 8.1, MS Win10 Pro.
Will not respond to PM requests for support -- use the forums.