windows 10 boot manager missing.

Question

i have a hp 450 g5 that says boot manager missing. the only other computer i have access to is a samsung xe500c12 chromebook. i have downloaded the windows iso on a flashdrive but the hp wont boot from it. any suggestions

Answer 1

Hi Derek. I'm Greg, an installation specialist and 9 year Windows MVP, here to help you.

Unplug power and remove battery, press and hold power button for 30 seconds to release all power from circuitry, plug back in and power up to see if any change.

I will give you steps to access the Repair Mode to try all repairs to get Windows started, and if not to do the automated Reset or the superior Clean Install after rescuing your files. These steps don't cover possible hardware failure which might become apparent while performing the steps, so please report back as you go:

1. Use whichever method works in this link to access Advanced Startup Options: https://www.tenforums.com/tutorials/2294-advanc.... Easiest may be to force shut down the PC (by holding in the power button) three separate times to trigger the Startup Options. If one of these methods work, then go to Step 3.
2. If none of the other methods work it may be necessary to Create Windows 10 Installation Media on another PC: http://windows.microsoft.com/en-us/windows-10/m... Make sure to uncheck the box for Recommended Settings to choose only the licensed version.

If the Media Creation Tool will not cooperate use the alternate download site at https://tb.rg-adguard.net/public.php. Burn to DVD using WIndows Image Burner or create bootable flash using one of the options here: https://www.tenforums.com/tutorials/2376-create...

Insert media, boot it by powering up PC while pressing the BIOS Boot Menu Key: https://www.sysnative.com/forums/hardware-tutor...

Choose the boot device as a UEFI device if offered, then on second screen choose Repair Your Computer. If the media won't boot you may need to enter BIOS/UEFI Setup (pressing key given in chart in link above) to turn off Fast Boot or Fast Startup first.

3. In the Advanced Troubleshooting options try to System Restore to a point before the problems began, Startup Repair, then if necessary from Startup Settings try to get into Safe Mode with Networking, or lastly Safe Mode.

If Startup Settings aren't available you can force Safe Mode from Command Prompt following Step 5 here: https://www.digitalcitizen.life/4-ways-boot-saf..., or using the command to unhide F8 Advanced Boot Options here: https://www.tenforums.com/tutorials/22455-enabl... where you can also try the old reliable Last Known Good Configuration.

4. From Safe Mode w/Networking work through the Windows 10 Install Integrity Checklist to make sure the install is set up correctly, optimized for best performance, and any needed repairs get donehttp://answers.microsoft.com/en-us/windows/wiki/windows_10-performance/windows-10-performance-and-install-integrity/75529fd4-fac7-4653-893a-dd8cd4b4db00: If it doesn’t fix Windows enough to start it normally, then try a Windows 10 Refresh: https://www.howtogeek.com/265054/how-to-easily-...

Update your drivers from the PC's Support Downloads web page. Compare the latest drivers with the ones presently installed in Device Manager reached by right clicking the Start Menu. Make sure you have the latest BIOS, Chipset, Display (Video), Sound, USB3, Bluetooth, Network and all other drivers, or else download and install the latest now.

5. If Safe Mode doesn’t work or help stabilize things then return to Advanced Troubleshoot options. Next try Command Prompt to run through Windows 10 Install Integrity Checklist (above link) repair commands including sfc /scannow, DISM, a full Disk Check https://www.groovypost.com/howto/check-hard-dri..., or return to Troubleshoot options to Reset Your Windows 10 PC.
6. Better yet do the vastly superior Clean Install Windows 10 following the steps in this link to delete all partitions down to Unallocated Space to get it cleanest: http://answers.microsoft.com/en-us/windows/wiki...
7. There is a step to Rescue Files from the booted media or Repair Mode Command Prompt first: http://answers.microsoft.com/en-us/windows/wiki...

These steps are excerpted from my tutorial that compiles everything possible for Troubleshooting Windows 10 Failure to Start: http://answers.microsoft.com/en-us/windows/wiki.... You can continue with the other steps there.

I hope this helps. Feel free to ask back any questions and let us know how it goes. I will keep working with you until it's resolved.

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Answer 2

Likely options are:

a) Use Rufus

b) Use a working computer at a public library to create a bootable Windows 10 iso:

https://www.microsoft.com/en-us/software-download/windows10

https://www.tenforums.com/tutorials/9230-download-windows-10-iso-file.html

Answer 3

Hi Derek

When you say you have downloaded the ISO onto a flash drive, did you just copy that onto the flash drive, or did you use a tool to create a bootable flash drive from that ISO?