Windows 10: Windows 10 not listed in boot options.

I am using an ASROCK motherboard. Yesterday I tried to install Ubuntu onto a second disk, later when I tried to boot into Windows 10 I couldn't get into Windows with GRUB nor the boot list. My windows disk was initially MBR which I converted to GPT before installing Ubuntu.

I have access to Windows RE which i can boot into.

I have tried bootrec /fixmbr and /fixboot, both returning a success but not fixing the issue.
bootrec /scanOs returned Windows 10 on D:/ for some reason??
chkdsk C:/ returned no errors.
os-prober on Ubuntu returned nothing.

I am able to access all my files so if worst comes to worst I can save what I want and wipe both drives however I don't want to do this unless it is necessary.

*I'm not a Linux pro

:)

 

Windows 10 Tweaks

Pressing “Windows+Pause Break” (it’s up there next to scroll lock) opens the “System” Window.

Windows 10: In the new version of Windows, Explorer has a section called Quick Access. This includes your frequent folders and recent files. Explorer defaults to opening this page when you open a new window. If you’d rather open the usual This PC, with links to your drives and library folders, follow these steps:

• Open a new Explorer window.
• Click View in the ribbon.
• Click Options.
• Under General, next to “Open File Explorer to:” choose “This PC.”
• Click OK

credit to Lifehacker.

 

How does Windows boot to advanced recovery option e.g. command prompt?

- that gives me a 454 'Unexpected error' This tells me that the BCD is partially corrupted.

The commands: shutdown.exe /r /o /f /t 00
or: %SystemRoot%\System32\Cmd.exe /c reagentc /boottore&shutdown /r /f /t 00
should boot into Recovery if everything is configured correctly.
FYI, If Windows is configured correctly:

1. If Reagentc is disabled, you still can get into Recovery but with limited options.
2. If Reagentc is enabled, you'll get all options.
3. If you boot Windows using Recovery USB stick, You'll get into Recovery with couple of options missing.

Here's my suggestion if you want to try:
OPTION 1: Will save the trouble of re-install Windows.

1. Download the image of my first 3 partitions (450MB Recovery, 100 MB EFI partition, and 16MB unformatted primary)
   EFI_Boot-00-00.7z - Google Drive
2. Run Macrium and restore the image from step 1, overwriting your existing 1st three partitions, leaving C alone.
3. Delete the 490MB Recovery partition.
4. From Macrium, run fix boot problems.
5. Reboot. Open Admin command prompt then run Reagentc /info to make sure that it is enabled. If not, enable it.
   if failed to enable, reboot and try again.

OPTION 2: Assuming you've already had Windows backup with Macrium.

1. Wipe out the first 5 parttiions. (450MB, 100MB, 16MB, C Drive, 480MB)
2. Fresh install Windows 10
3. Restore C drive from backup image, run fix boot problems
4. repeat step 5 from OPTION 1 above.

 

Re: All boot options are tried...

Hi Elda,

If the boot sequence didn't work, then we suggest try running the laptop in safe mode. To do this, here's a few steps to follow:

• Power down your laptop.
• Turn it back on again.
• When you turn it back on, press F8 repeatedly until the power on option appeared.
  
• If you see the boot option "Safe Mode with Networking", choose that option.
• See if you can boot up in Safe mode.

We'll look forward to your response.