Question Windows10 takes ~2 min to boot-up and only loads if Windows Boot Manager is #1 boot option

hellzer

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Windows 10 Pro, 21H2 updated

I am having this small issue where the Windows OS takes about 2 minutes to boot up, previously half that and even less. I don't know exactly when or why this started happening.
I have 2 SSD's and 1 HDD. Checked the disks and their health, everything is OK. I don't have any other issues once the windows loads up. Main drivers are updated. Everything works fine.
I checked boot order in BIOS:



Now I never used to have boot manager as an option on the list. And here it was even at the top of the priority list. So I tried switching my OS SSD back from #2 to #1 order. And as soon as I did that, my Windows 10 stopped completely from loading up.







I get the black screen with white letters on Windows Boot Manager and all I can do is press reset. I switched back to how it was before and back again on 2 min boot up times.

I also tried inserting windows installation and doing automatic repair. That failed.
Tried using bootrec /fixmbr via cmd propmt and it said "access denied."
Also tried rebuilding BCD file and it did find windows installation but it showed the disk (D:) when my USB contains windows installation files and the windows itself was always installed on disk (C:)... And it also failed:






Ultimately I could reinstall windows and probably get everything up and running perfectly but I don't want to lose all my installations, etc.
 
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hellzer

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Well I definitely did not mess with BIOS or any hardware for sure. Like everybody else I kept my drivers up to date, installed and deleted a few apps here and there. The usual stuff.
I really don't know what could have caused this. Most likely, a virus? You get those once a while...

But I am wondering, when I make my OS SSD #1 boot option. The windows boot manager gives me an error and says: The boot selection failed because a required device is not accessible. How can that be when Windows loads up anyways if I just make Windows boot manager (OS SDD) back to #1.
 
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USAFRet

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But I am wondering, when I make my OS SSD #1 boot option. The windows boot manager gives me an error and says: The boot selection failed because a required device is not accessible. How can that be when Windows loads up anyways if I just make Windows boot manager (OS SDD) back to #1.
Showing the rest of us your Disk Management window would help here.
 

hellzer

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So I used Windows option to reset my PC, download Windows via Cloud and reinstall them. Did not solve the issue.

So what can be the reason? Cables?
 

hellzer

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Yeah I just did that and even switched SATA cables between two SSDs to check if it's specific cable issue or not. Once again if the #1 boot option is Windows Boot manager, the windows will load up but in ~2 minutes. If I set just the Windows SSD as my #1 boot option and manager as #2, now I get this error:


Pressing a key just prompts the same message...


Question: Maybe Windows boot manager actually should be #1 boot option and otherwise it shouldn't load? That however wouldn't explain why it takes a bit longer for windows to load. Even after reinstall.
 
Yeah I just did that and even switched SATA cables between two SSDs to check if it's specific cable issue or not. Once again if the #1 boot option is Windows Boot manager, the windows will load up but in ~2 minutes. If I set just the Windows SSD as my #1 boot option and manager as #2, now I get this error:


Pressing a key just prompts the same message...


Question: Maybe Windows boot manager actually should be #1 boot option and otherwise it shouldn't load? That however wouldn't explain why it takes a bit longer for windows to load. Even after reinstall.
Work on the boot time first.
Only connect the OS disk.

Post a screenshot from crystal disk info.
 
Question: Maybe Windows boot manager actually should be #1 boot option and otherwise it shouldn't load?
Yes exactly.

Windows boot manager is UEFI botloader on Disk 1 (EFI system partition).
That's the correct one to use.
You should remove other boot options. They just cause confusion.

It's possible, you may have another bootloader (legacy bootloader - 100MB System Reserved E: partition) on Disk 2.
I'd suggest - you delete it
 

hellzer

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I already reconnected the other two now. But I did try only running OS SSD... It didn't change anything except me gave me a new black screen that I posted few hours ago.


 

USAFRet

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I don't see how that is relevant to the topic when disconnected HDD didn't solve the problem. But here you go:
A failing drive, or partially failing drive, can have major impacts on boot up performance.

With the HDD disconnected and you get a "black screen" saying 'Reboot and select...' means that the boot partition lives on the HDD.

May we assume the HDD is Disk 2?
 

hellzer

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That was also with second SSD disconnected. Which is Disk D. And during an attempt to rebuild BCD via cmd, the prompt said the windows are on D disk. I really doubt there is anything on HDD tho. The things just keeps passive files and never had anything to do with Windows.
 
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