New
#11
Look at the link in my previous post #4 where you can download Windows 8.1 ISO. Put in a USB/CD then you can re-install Windows 8.1. Make sure you select correct Edition that you previously had with your Laptop so that Windows can be activated by reading the Product Key embedded in the BIOS.
Actually it is best to do this way. A fresh clean Windows 8.1 installed without any third party Software then upgrade to Windows 10 might go smoothly without any conflict.
@caperjack
No, I was not commenting yours but the previous one. However, doing a boot repairr is a hit and miss and sometimes it does not work, especially when you have multiple recovery partitions.