مشكلة في تمهيد اقلاع النظام

A backup must be on a drive or partition that Windows is not installed on

Is it required that the backup copy be on an external disk

Your best option is to reset Windows, then if you do have a system image created you can then use that from inside Windows.

نعم النسخة الاحتياطية موجودة على ذات القرص الصلب ولكن ليس على ذات القسم من القرص

I think your only option now will be a Windows reset, because that dialog indicates there is no system image found on another drive you can restore form.