Recently, I was trying to delete a file in my laptop (has Windows 7) which threw an error as "Could not find this item" and was not deleting that file at all.
After searching for sometime, I finally found a solution which helped me in deleting the file.
Here is the solution:
1) Open a Command Prompt.
2) Browse to the folder containing the buggy file.
3) Type 'dir /x' to obtain the 8.3 formatted filename.
4) Delete the file using the 8.3 filename, e.g. 'del 0WELCO~1' (as shown below)
Hope this information may help you and others with the same problem.