Windows 10: Dual Boot System - RTM Partition No Longer Available

I created a dual boot system quite some time ago and all was well until . . .

RTM partition was completely up-to-date. I had recently updated to Windows 10 Build 10251 on the Insider partition.

I turned the machine off on Sunday January 31, left town, and returned Saturday February 6. All was well with the dual boot when I turned the system off before leaving. When I turned the system on last night, it booted directly into the Insider Partition. There seems to be no option to boot into the RTM partition.

Help!

:)

 

How do I restore dual boot capability after Windows 10 clean install removed it

My computer was dual-boot with Windows 7 boot partitions on two separate drives. After upgrading to Windows 10, the dual boot provision worked fine. However after a clean install of Windows 10, dual-boot capability is no longer available. The boot partition
for the remaining Windows 7 syBistem is intact. Only the dual boot option is gone.

I tried the changing the default operating system under System Properties/Advanced/Startup and Recovery, but the only choice is Windows 10. Windows 7 isn't a option. I'm guessing that the clean Windows 10 install wiped out access to the dual-boot menu.

Thanks.

Bill

 

Dual boot Windows 10 and Windows 7 by cloning Windows 7 to new HDD

Old title: Dual boot Win 10 and Win 7

Have Win 10 on SSD C:\ and a failing HDD with Win 7 and some programs I don't want to lose. I have a new HDD to use to create a dual boot. Media for Win 7 is no longer available. How do I clone the failing disk into a bootable partition on the new HDD?

 

Does the RTM partition still exist? If it does, IMO, it's only missing from boot manager.

 

Yep, I checked and it's still there (D:\). And I know nothing about the boot manager. *Sad

 

Press Win+R, type in -> msconfig <- Enter. Click on Boot tab, does the RTM is listed there? If it does, look at the Timeout box, the reading should be 30 seconds.

 

msconfig method should fix the issue.

Just to add..................
Control Panel > Power Options > left side, Require password on wakeup > Change settings that are currently unavailable >scroll down, UN-check "Turn on fast boot startup" > Save changes.

 

Thanks, Private; that worked!

Thanks, David. Private's solution worked. *Smile So, if I'm reading this correctly, fast boot could be the culprit? But, but, but, I like fast boot. *Smile

 

My next question would be, "Has anyone else with a dual boot system had this problem or is this one mine alone? Should I send feedback?"

 

No, you are not alone.
I have seen a few threads related to that.
Personally I had the same issue. I dual booted Win 10 and Linux and it rebooted to Linus automatically.
msconfig is the solution.
Also under msconfig > Boot > I would set the OS I use most Set as default.

 

Thanks, David! Feedback imminent! *Smile

FWIW, for me, the most recent "installation" remains the default boot OS. Since RTM was the first installed, and I haven't clean installed it since the "November Release", each new build that's clean installed becomes the default; if I don't choose one or the other, the default boots.

 

Yes, the "latest" install becomes the default.
That is why I mentioned about choosing which one you want as default. You might not want Insider build as default.

 

Yeah, I do want the Insider build. *Smile Reason being that I use it as a "daily" OS for the most part. All files are on an external drive.

 

At first I thought the otherwise. *Biggrin Glad it worked.

You're welcome.