Windows 10: Windows prompting me to select operating system

the same thing as this old solved post https://www.reddit.com/r/Windows10/comments/bg4ui3/windows_prompting_me_to_select_operating_system/

but my question is just what would happen if I selected the other boot?

submitted by /u/PuffinRex
[link] [comments]

:)

 

Windows Couldn't update the system reserved partition

What is your operating system version and build?

What troubleshooting steps have you made?

Open administrative command prompt and run: C:\$Windows.~BT\Sources\Panther

Search for these log files and post with onedrive or a cloud link.
setupact.log
setuperr.log


In administrative command prompt run:

1) diskpart
2) list disk
3) select volume 0
4) list volume
5) select volume 1
6) list partition
7) select volume 2
8) list partition
9) select volume 3
10) list partition
11) select volume 4
12) list partition
13) exit

Please copy and paste into the post.

 

Dual boot not allowing to select Operating system.

Hello,



Thank you for contacting Microsoft Community.



We understand your concern in this regard.



Suggest you to try the below mentioned steps and check if they helps you.



* Press Windows logo key + R to open run command

* Type Systempropertiesprotection into it and hit
Enter key.

* Go to Advanced tab, then click Settings
under Startup and Recovery

* Select the check box against theTime to display list of operating system
under System startup.

* Set the time in seconds if required, then click OK and
OK.



Now restart your PC and see if it give option to choose operating system on
System startup.



Keep us posted if you require further assistance.

 

Error: "An operating system wasn't found. Try disconnecting any drives that don't contain an operating system"

Hi Stephen,

I realize the inconvenience you are facing in accessing the operating system. Now that you have me with you let me take care of this.

Do let us know if you are able to see Windows 7/ Windows 10 operating system while rebooting the device?

As you are unable to boot the operating system, this issue might have occurred when the boot files are missing or corrupted.

I suggest you re-built the boot rec by following the below commands and check if it helps.
You will have to use Windows 10/7 installation media to follow the steps to boot into Recovery Environment and try to rebuild BCD.

Step 1: I suggest you to create an installation media for
operating system using the media creation tool

If system boots to Windows 10:
Installing Windows 10 using the media creation tool

If system boots to Windows 7: Download Windows 7 Disc Images (ISO Files)

Step 2: After preparing the installation media, insert it hard reboot the device and follow the below:

• Boot into Windows Recovery Environment using the Windows 10/7 installation media.
• Click on Repair your computer.
  
• Click on Troubleshoot and in the Advanced options.
• Select Command Prompt. Type the following commands into the prompt and press Enter key after each command.

• bootrec /fixmbr

• 
  bootrec /fixboot
  
• 
  bootrec /scanos
  
• 
  bootrec /rebuildbcd
  

5. Restart the computer.

NOTE: Modifying BIOS/ complementary metal oxide semiconductor (CMOS) settings incorrectly can cause serious problems that may prevent your computer from booting properly. Microsoft cannot guarantee that any problems resulting
from the configuring of BIOS/CMOS settings can be solved. Modifications of the settings are at your own risk.

Hope it helps. Reply to the post with an updated status of booting the operating system for further assistance.

Thank you.