[JULIUSGT]

Hi
I have been using calibre for several years on Windows 10.
For about 15 days Calibre no longer wants to launch.
I have reinstalled several times by deleting all files, dll, registry keys, etc.
With versions 7.20 or 7.21.
I tried with Calibre portable impossible to launch Calibre.
The "calibre-debug -g" allows from time to time an opening of a few seconds.
Launches once with calibre-debug -g with the administrator command prompt, then closes without comment.
Who can provide a solution to this problem.
Attached file the results of "calibre-debug -g"
Thanks.