Ihave 2 Operating systems on my HP Probook 6570b i.e. Windows 7 & Windows 10. In the after noon because of no electricity & low power it got shut down. In the evening I tried to switch it on but only the first starting page is visible which keeps repeating without any break with no Booting Options. I tried to reinstall the Operating System using my pendrive. Even when I press Ësc"on Boot options it gives options as Boot from pendrive. But when I click on it , again the same first page comes with no booting or restore options.The Disk tests are also passed.
Kindly let me know how to solve this problem at the earliest.