This warning is caused by the Turkish character problem. You must edit your computer language and region settings in Turkish.
Enter the control panel.
Click on the clock, language, and region icon.
Click on the title of the region .
The region dialog will open. If you set the "Language of non-Unicode programs" option to your language in the Administrative tab, the characters will appear correctly.
To do this, click on the change system locale button.
The region settings dialog will open. List of Your Region you select.
After doing the procedure, turn the computer off and on.
If this warning appears even though your settings are in your language, you must first select a different language and country and restart your computer. Then again, Region will fix the problem if you select restart.