Question BSOD error "Unmountable Boot Volume" ?

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hariprasath4505

Jun 14, 2024
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I had an ISO file. I mount it into a virtual drive. After that, I restarted my laptop. It stuck in BSOD error with stop code "Unmountable Boot Volume". How do you fix it?
 
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hariprasath4505 said:
Is there any other easy way out?
Click to expand...
Unmountable boot volume means - there is some problem with boot process:
OS drive corrupted/ inaccessible/ failed,
bootloader corrupted.

You have to boot into some diagnostic environment (like windows installation environment)
and perform appropriate steps to diagnose the situation.

It's possible at the end you'll have to reinstall windows or replace your OS drive.
Or you can also skip diagnostics and replace the drive without checking anything.
 
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OS: Windows 11

BSOD error stop code: "Unmountable Boot Volume"

I tried these fixes:
  • Used a usb Windows installation media -> startup repair, issue not solved.
  • Opened command prompt -> tried following commands: bootrec fixboot, rebuildbcd, fixmbr. Result: total Windows installations found:0
  • Launched notepad -> save as. It showed only my 16gb pen drive (which is installation media), not my SSD.
  • My laptop has a 512GB SSD but it's not shown in the "save as" dialog box.

I need a fix for this BSOD error without a complete Windows reinstall. Please help
 
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hariprasath4505 said:
cmd scan says installed windows 0. mine is asus tuf gaming 15 lap, brand new one. bios does recognize my 512gb ssd. but why not cmd??
Click to expand...
Check BIOS.
See if OS drive is being detected there.
If it's not detected, then drive is dead. Get a new drive.

If it is detected, then continue testing.
Boot from Windows installation media and execute following in command prompt
(press Shift+F10 to open command prompt)
diskpart​
list disk​
select disk 0​
list partition​
detail disk​
list volume​
Make a screenshot (with your phone camera) and show here.
(upload to imgur.com and post link)
 
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SkyNetRising said:
Check BIOS.
See if OS drive is being detected there.
If it's not detected, then drive is dead. Get a new drive.

If it is detected, then continue testing.
Boot from Windows installation media and execute following in command prompt
(press Shift+F10 to open command prompt)
diskpart​
list disk​
select disk 0​
list partition​
detail disk​
list volume​
Make a screenshot (with your phone camera) and show here.
(upload to imgur.com and post link)
Click to expand...
yes bios detects my ssd. its a new lap, few month used, so no problem with the ssd
cmd does not detect it. when i enter list vol, only pen drive is displayed, not the ssd
save as option in notepad also shows only pen drive
after lot of research, i found that my lap has secure boot feature enabled, it denies access to ssd by unauthorised agents. could that be the reason why my ssd was not detected?
 
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hariprasath4505 said:
yes bios detects my ssd
cmd does not detect it. when i enter list vol, only pen drive is displayed, not the ssd
Click to expand...
Does diskpart/list disk command show your SSD?
Can you show requested screenshot?

If BIOS shows the drive and diskpart/list disk - doesn't,
then create a new windows installation media with latest windows version.
Your installation media may be outdated.
hariprasath4505 said:
after lot of research, i found that my lap has secure boot feature enabled, it denies access to ssd by unauthorised agents. could that be the reason why my ssd was not detected?
Click to expand...
Disable secure boot and see, if that changes anything.
 
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SkyNetRising said:
Does diskpart/list disk command show your SSD?
Can you show requested screenshot?

If BIOS shows the drive and diskpart/list disk - doesn't,
then create a new windows installation media with latest windows version.
Your installation media may be outdated.

Disable secure boot and see, if that changes anything.
Click to expand...
First, thanks for your reply.

Status update:
I disabled secure boot in bios
Does diskpart lists SSD? - yes, it does list my SSD
I also checked with notepad.exe -> save as, now I can see my SSD listed
 
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SkyNetRising said:
Does diskpart/list disk command show your SSD?
Can you show requested screenshot?

If BIOS shows the drive and diskpart/list disk - doesn't,
then create a new windows installation media with latest windows version.
Your installation media may be outdated.

Disable secure boot and see, if that changes anything.
Click to expand...

SkyNetRising said:
Does diskpart/list disk command show your SSD?
Can you show requested screenshot?

If BIOS shows the drive and diskpart/list disk - doesn't,
then create a new windows installation media with latest windows version.
Your installation media may be outdated.

Disable secure boot and see, if that changes anything.
Click to expand...
Here's the screenshot
https://imgur.com/a/j72o5fl

This cmd is from windows inbuilt advanced options, not from usb installation media
View: https://imgur.com/a/j72o5fl
 
Last edited:
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SkyNetRising said:
You're not showing entire command output.
I don't see result of
list disk​
list partition.​

Only USB drive is being shown.
It appears your storage device is either not being detected or is completely empty - no partitions/no data.
Click to expand...
both list disk & list partition commands show only my usb drive. not my ssd
but when i type same commands in cmd of advanced boot options, I can see my ssd partitions listed. I have already shown this in my earlier screenshot
 
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hariprasath4505 said:
but when i type same commands in cmd of advanced boot options, I can see my ssd partitions listed. I have already shown this in my earlier screenshot
Click to expand...
Then do those commands from advanced boot options and show result.
You didn't show list partition command output.

Your windows installation media is probably outdated and doesn't have necessary storage drivers included.
That's why it's not showing all the drives.
You'd have to create a new windows installation media with latest windows installer version.
 
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SkyNetRising said:
Then do those commands from advanced boot options and show result.
You didn't show list partition command output.

Your windows installation media is probably outdated and doesn't have necessary storage drivers included.
That's why it's not showing all the drives.
You'd have to create a new windows installation media with latest windows installer version.
Click to expand...
Here's the image
This shows list disk & list partition commands
https://imgur.com/a/YQXlYH0
View: https://imgur.com/a/YQXlYH0



Executing the same commands in advanced boot options gives expected results, my SSD with all its partitions and volumes are listed (as shown in my 1st screenshot)

But the issue is, I am unable to reach advanced boot options now. Till afternoon I was able to reach advanced options. Now the PC boots straight into bitlocker recovery window, no matter I enter the key or not, I am left with no option but to shutdown my PC. Tried multiple times but I could reach advanced boot options

I have previous experience with BSOD errors, have used advanced boot options or installation media to solve such errors. But this one is irritating. The main difference I guess is the bitlocker encryption. In other PCs, there was no such thing as bitlocker encryption, I could access OS drive from installation media, unlike this lap. This lap is Asus tuf gaming 15, new one with bitlocker feature. I've even disabled secure boot option in BIOS settings, but to no avail. Whenever I turn on my lap, right after Asus logo it heads straight to bitlocker recovery key window and failing again and again to start, irritating and wasting my precious time
 
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SkyNetRising said:
Then do those commands from advanced boot options and show result.
You didn't show list partition command output.

Your windows installation media is probably outdated and doesn't have necessary storage drivers included.
That's why it's not showing all the drives.
You'd have to create a new windows installation media with latest windows installer version.
Click to expand...
regarding windows installation media: my installation media is not old, bcoz just before 2 days i downloaded win11iso directly from windows website
waiting for your help
 
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hariprasath4505 said:
Now the PC boots straight into bitlocker recovery window, no matter I enter the key or not, I am left with no option but to shutdown my PC.
Click to expand...
Bitlocker completely changes everything.
If you can't unlock it, then data is not recoverable.

Clean your SSD and reinstall windows or restore from backup. But I'm guessing - you probably haven't made any backups.
And don't use bitlocker next time.
 
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SkyNetRising said:
Bitlocker completely changes everything.
If you can't unlock it, then data is not recoverable.

Clean your SSD and reinstall windows or restore from backup. But I'm guessing - you probably haven't made any backups.
And don't use bitlocker next time.
Click to expand...
I don't want to reinstall windows bcoz I have many important files in c drive that I can't afford to loose
What's the way out?
 
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hariprasath4505 said:
I don't want to reinstall windows bcoz I have many important files in c drive that I can't afford to loose
What's the way out?
Click to expand...
That's the cost of bitlocker and not having any backups.
You have to get rid of bitlocker encryption first.
But since you can't unlock it anymore (probably because of some file system corruption), then there is no access to your encrypted data.

It's like putting your valued items in a safe and then damaging safe lock mechanism, so lock doesn't fit anymore.
 
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SkyNetRising said:
That's the cost of bitlocker and not having any backups.
You have to get rid of bitlocker encryption first.
But since you can't unlock it anymore (probably because of some file system corruption), then there is no access to your encrypted data.

It's like putting your valued items in a safe and then damaging safe lock mechanism, so lock doesn't fit anymore.
Click to expand...
What could have caused file system corruption??
 
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