Hi Michael,

Try deleting the file in safe mode. Follow the steps below:

1. Immediately after the computer is powered on or restarted (usually after you hear your computer beep), tap the F8 key in 1 second intervals.


2. After your computer displays hardware information and runs a memory test, the Advanced Boot Options menu will appear.


3. Use the arrow keys to select Safe Mode or Safe Mode with Networking and press ENTER.

You can also delete it forcefully.
Enter the command prompt (Start-> Run-> Cmd) and enter ‘del /f filename’, where ‘filename’ is the name of the file or files (you can specify multiple files using commas) you want to delete.

I hope this helps.

Regards,
Lokesh

I am using Windows 8 and had the same issue even with a proper export. Oddly enough,  it also seemed to interfere with Windows Explorer working properly, with "This PC" hanging and thumbnails failing to load. Safe Mode, takeown, and cmd did not work for me. 

My understanding is that Unlocker works, but also happens to have its own adware. I've never used it myself, so I can't say from experience. I would just say to download at your own risk, and I'm glad it worked for you. 

A far easier solution I discovered (inspired by helpER FAQ's answer) is to simply open up FL Studio, locate the files in your file browser, right-click>Windows shell menu>Delete. And poof! It was gone. 

Not sure why the shell menu needed to be accessed through the DAW to work. Maybe the DAW knows something about the file location that Windows does not? I'm no expert with operating systems. 

Anyways, if anyone else has this issue, I would at least try this method before downloading 3rd party software. Hope this helps!

For those who can not delete wav-files using Unlocker or Revo Uninstall: I have exactly the same problem it was a year ago. Just came back. On the desktop got out a few of wav-files from FL-Studio 10, which are not removed and brake system. There are ways to remove these wav-files. It's pretty weird, but works perfectly (on-at least for me). Neither Unlocker or REVO Uninstaller PRO (which is $ 40) does not remove them. Record recipe: 1) download and install the free prog AIMP, it is like winamp, the function performs the same. 2) Open the main menu, AIMP, the screen should appear the program's. 3) add the file into the window you want to delete 4) click on the file in the program window, right-click menu appears 5) in the mouse get the \ "delete \", then get out another menu where you need to click on the \ "delete selected files from the disk \" 6) The file will be deleted, even if the program hangs. Just have to wait a minute or two, and if the program is closed, then close it by force. All actions should be carried out slowly, ie after each trip to wait at least a minute. Do not add the window Applications AIMP multiple files one by one. Again, if the program hangs, wait 2 minutes, and then close the program mandatory. I have no idea how it works and how it is interconnected, but this way I have twice got rid of these files. Without restoring or reinstalling the system, disk formatting and other \ "disease \" of adverse effects.