Hidden partition recovery/ Dell Precision m6500

Hi

I have a problem to recovery my Dell Precision m6500 to factory settings from hidden partition

Since i clone my disk from HDD to new SSD (hidden pratition include) and install Windows 10N i can't activate it with my serial number (to windows 7 pro) so i decided to recover it to Win 7 from hidden partition, but i cant.

I tried system recovery but i can't select factory reset. I have acces to hidden partition but when i open it it's empty.

I recived laptop without any disc so i cant do simply format and install system from dvd.

Please help

Jacob

Leptop: DELL PRECISION M6500

OS: WINDOWS 10N