Windows 10: Secondary drive marked as System + Black screen

Holton · May 4, 2021

Hello, I have similar problem to these two: a secondary drive marked as system drive? Solved - Windows 7 Help Forums BOOTMGR is on the wrong drive? Partition marked as SYSTEM Solved - Windows 7 Help Forums I've read those posts but I'm not sure about the instructions and I need help specifically with my case. I'm a little bit worried about data loss because there are some info saying that those changes can make some issues. Also I have additional problem that can be connected to this? While I'm turning on my PC(monitor is ON) there's black screen There's no screen until Windows login screen (There's sound of GPU fans spin and then Windows login screen is showing up) Monitor is connected to the GPU. But while I'm connecting monitor to the motherboard hdmi everything works great. I can see everything from the start to the windows login screen. Thank You.

:)

Holton · May 5, 2021

Secondary drive marked as System + Black screen

Hello thanks for the response,

I made backup(image) of C drive with Macrium. Strange thing, when I tried to make a backup also windows icon was on the D drive. I'm not sure if making only C(system) backup was good option. Or should I check C and D

But the rest of the screenshot are here because it double posted and I tried delete it but there's no option for me even with WYSIWYG advanced post edit option.
Secondary drive marked as System + Black screen

The simplest and most routine way to correct a partition mess independently is

a. image your windows partition
b. With only the system disk connected, clean install Win 10, deleting all existing partitions comprising the O/S (you can keep data partitions).
c. Given your situation, note the attributes of your Windows partition.
d. restore your Windows partition
e. check its attributes and compare with (c) - correct as necessary
f. attempt to boot- either automatic repair will kick in, or you can run Startup Repair if necessary.

Otherwise you need detailed technical steps which could be time consuming and iterative.
Click to expand...

The worst scenario that I'm worried is that I'll make those steps and my original system image wont restore. I have now a lot of stuff to do on my PC and I don't want to make myself problems.

Holton · May 5, 2021

Secondary drive marked as System + Black screen

Sorry for the response time, a lot of stuff.

You may need to replace C: drive letter with Windows 10 installed partition drive letter.
Click to expand...

I'm confused a little bit. Will system partition have letter D?

Also as Macboatmaster says "I think it may be legacy - MBR" so then should I use this metod?

Re no image until log on screen when using actual graphic card MAY be fast startup
check in settings if enabled
Click to expand...

I tried it now, unfortunately doesn't work

Reinstall is not my target option.

Screens attached below(previous ss didn't load)