Question: I previously installed Ubuntu on a USB drive. I have since lost it or deleted the data and when I go to try to install it says it is already installed on the usb drive letter. How can I fix this? 

This is the error that I'm getting. I do not have the USB drive or it is deleted. I have 10-15 usb drives and have no clue which one it would be. I am using Wubi to try to install. 

![enter image description here](https://i.stack.imgur.com/Eayms.jpg)

Answer: 
> 
> Its look like you have a grub entry which is created using bcdedit ?!
>  Go to Windows control panel and check whether there is "Wubi
>  uninstaller" menu or not. If it is there then use it to completely
>  uninstall previous Ubuntu. Use CCleaner to clean the registry
>  afterwards.
> 
> 
> 

– [Curious Apprentice](/users/53649/curious-apprentice "81. reputation") May 4 at 2:37
Just do a low-level format on that USB drive.