How do i fix my booting issues

Hi kieran jantzen

Welcome to Microsoft Community.

Happy Holidays!

From your description, I understand that you have two SSDs, a 1TB primary drive and a 500GB secondary drive. However, the primary hard disk doesn't seem to show up as a boot device in the BIOS and boots the computer from the 500GB secondary hard disk. The only way to force the computer to boot from the 1TB primary hard disk is to unplug the 500GB secondary hard disk, and I know exactly how you feel!

As things stand, I personally believe there are a number of reasons for this.

1. Misconfigured boot order: Your BIOS may have set the priority of the 500GB SSD higher than the 1TB SSD.
2. Corrupted boot configuration: The boot configuration data (BCD) on the 1TB SSD may be corrupted, preventing it from showing up as a bootable device.
3. Connection issues: The SATA port or cable on the 1TB SSD may have a loose or faulty connection.
4. Hard disk health: The 1TB SSD may be faulty or problematic.

However, since we don't load any system-related files or drivers after entering the BIOS, only the BIOS and hardware, we may prioritize the system level and software level for exclusion.

I will give you some advice that I hope will help. However, if necessary and the problem persists, we can try to contact the motherboard or hard disk manufacturer to perform a more in-depth hardware test with a device or test computer.

Option 1: Considering that it is not shown as a boot device in the BIOS, it means that the motherboard is not detecting the 1TB primary hard disk.

So we can try the following steps.

1. Power off and unplug the computer.
2. Open the case and check the SATA and power connections of both SSDs.
3. Try swapping the SATA cables or ports of the two SSDs to troubleshoot cable or port failures. (Swap the cables and ports of the original 500GB for this main 1TB drive and swap both)

If there are other power cables or cables that fit the motherboard and hard disk, we can try to replace them.

Option 2: Considering that sometimes the problem may be caused by corrupted boot configuration data on the hard disk, we try to scan and repair the boot configuration from the command line.

First you need to enter WinRE, please follow the steps below to enter:

(1) Press and hold the power button for 10 seconds to turn off your device.

(2) Press the power button again to turn on your device.

(3) Immediately after seeing Windows start up (e.g., some devices display the manufacturer's logo on reboot), press and hold the Power button for 10 seconds to turn off your device.

(4) Press the Power button again to turn on your device.

(5) When Windows reboots, press and hold the Power button for 10 seconds to turn off your device.

(6) Press the Power button again to turn on your device.

(7) This time, allow the device to fully boot up.

(8) Select Troubleshooting.

(9) Select “Advanced Options”.

Under “Advanced Options” select “Command Prompt” -> enter the following command

bootrec /fixmbr

bootrec /fixboot

bootrec /scanos

bootrec /rebuildbcd

Restart your computer after the run is complete and see if the problem still exists.

Option 3: If you can still boot the 1TB SSD after unplugging the 500GB SSD, consider running a disk check.

1. Let's first try to scan and automatically repair possible bad sectors or hard disk issues from the command line.

Repeat the steps in Option 2 to enter WinRE and select “Command Prompt”.

chkdsk /f /r

Disclaimer: Running chkdsk can check the file system and file system metadata of a volume for logical and physical errors. To avoid any trouble for you, do not cancel or interrupt chkdsk, and back up important data.

2. We try to perform more in-depth diagnostics with the help of specialized diagnostic tools provided by hardware brands or third parties.

In particular, the SMART status of the hard disk.

These steps may narrow down the problem as much as possible, or at least make sure that our hard disk is working and does not have bad sectors.

Option 4: After going through the above troubleshooting steps, we can successfully rule out problems with the hard disk itself, as well as the possibility of a corrupted boot configuration.

At this point the problem is narrowed down to the possible presence of motherboard slots or cables. (Option 1 has some troubleshooting options)

We tried updating the BIOS and chipset drivers, sometimes updating the BIOS and chipset drivers can solve some compatibility or hardware conflict issues.

Please note: Please try the latest version of BIOS and chipset drivers first, if the problem still exists, we can try some known older and more compatible versions.

Option 5: We can also try to resolve any misconfigurations that are causing boot problems by resetting the BIOS settings to their default state by clearing the CMOS.

To clear the CMOS we need to locate the CMOS battery on the motherboard (the small round battery) and remove it for about 5-10 minutes, then reinsert it. Also, there may be a jumper on the motherboard for clearing the CMOS. Refer to the motherboard manual for specific instructions.

Please note that clearing the CMOS is a high-risk operation and improper handling may result in damage to the motherboard or even other hardware, so I recommend that you refer to the video tutorials provided by the motherboard manufacturer or seek the help of an offline technician.

Option 6: If all else fails and you have access to your 1TB SSD. If necessary, we can try backing up the data and performing a clean install of Windows. which can solve the deeper issues with the boot configuration.

For a clean install you can refer to: Windows 11 Clean Installation

But this is the last step we consider at the system level.

Disclaimer: I recommend that we try to perform a clean install to get your computer back into a working condition. Please ensure that you backup any important data, including Documents, Pictures, Videos, and more.

Assuming that the problem still exists after the above scenario is implemented, at this point we have already troubleshot the system, boot configuration, and some of the hardware related configurations, and we may finally need to shift the focus of our perspective to the hardware. Assuming the problem persists, I suggest you also synchronize the issue with the motherboard or hard drive brand's after-sales or technical support team, who are more familiar with their brand's products and may have had other users report similar issues. Perhaps they have already written a fix or a more targeted solution.

I sincerely hope that the above information will help you! Please feel free to contact me (Photos related to the question would be great!).

I look forward to hearing back from you. 

Have a wonderful holiday season!

Best Regards

Arthur Sheng | Microsoft Community Support Specialist