I can't create an image in w.10 with FROM php:7.2-apache COPY src/ /var/www/html/

In windows 10 everything that I have use to solve the issue is not acceptably.
I have change the permisions for admin.
I have deal with settings switch to windows.
The path route is right.
The file name of docker have the right ending.
I have allready try many options from the forum and nothing change.

“unable to prepare context: unable to evaluate symlinks in Dockerfile path: CreateFile C:\Users\user\Dockerfile: The system cannot find the file specified”

Many thanks in advance