I've faced this issue before and I tried know 4 different methods. There are several reasons that can cause this error. I cant explain every step in detail but I think anyone who is facing this issue would be able to understand or you can read this article: Fix No Bootable Device Error (Thoroughly explained) One of the following step will sort out the problem: 1. Are you using a tool to make your removable device bootable? If not, then create a bootable Windows 7 USB device via Rufus. 2. Restore the Operating System 3.Using following CMD Prompt: bootrec /fixmbr bootrec /fixboot bootrec /scans bootrec /rebuildbcd 4.Re-Install or Reset Windows

Window 10 users often face blue screen of death errors. I faced this issue before and I tried like 5 different methods. There are several reasons that can cause this error. I cant explain every step in detail but I think anyone who is facing this issue would be able to understand or you can read this article: Fix WHEA_UNCORRECTABLE_ERROR (Thoroughly explained) One of the following step will sort out the problem: 1. Disable Overclock in BIOS 2. Fix Corrupted or Incompatible Device Drivers 3. Uninstall any recently added Application 4. Fix Corrupted Windows System Files 5. Use Memory Diagnostic to fix Memory ( RAM ) Errors 6. Scan and Check Hard Disk for errors 7. Fix Corrupted Registry Files 8. Restoring Windows back to an earlier point in time