Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: Startup repair menu doesn't see an operating system

23 Mar 2014   #61
truerock

Windows 7 Ultimate 64-bit sp1
 
 

gregrocker,

Does the information in this thread apply to UEFI system boards running Windows 7 64-bit?


My System SpecsSystem Spec
.
23 Mar 2014   #62
gregrocker

 

Unfortunately, no. All of these repairs are for a Legacy install for MBR disks. The best I can advise for UEFI installs is to run Startup Repair and verbatim search the results.
My System SpecsSystem Spec
09 Jun 2014   #63
Mugsy

Win7 Home Premium x64
 
 
Works, but caveat

Quote   Quote: Originally Posted by gregrocker View Post
type:

DISKPART
LIST DISK
SELECT DISK 0 (confirm from list this is WIn7 HD #)
LIST PARTITION
SELECT PARTITION # (replace # with WIn7 part #)
ACTIVE
EXIT
This works. Huge thanks. But one note:

After applying the change, Windows reported "BootMgr Missing". But Windows Repair now detected my Win7 install and was now able to fix it.

Thx.
My System SpecsSystem Spec
.

09 Jun 2014   #64
Mugsy

Win7 Home Premium x64
 
 

Quote   Quote: Originally Posted by truerock View Post
gregrocker,

Does the information in this thread apply to UEFI system boards running Windows 7 64-bit?
I'm running 64bit Win7 with UEFI and was able to fix my Raid-0 C: drive using the above steps.
My System SpecsSystem Spec
09 Jun 2014   #65
gregrocker

 

Please post back a screenshot of Disk Management - Post a Screen Capture Image.

A UEFI install cannot be marked Active because it doesn't even use an MBR, which requires Active flag as a pointer to the System Partition.

Perhaps you have a UEFI system with CSM allowing an MBR bootable disk in it. In this case BIOS setup will be set to CSM with UEFI boot first or not.
My System SpecsSystem Spec
09 Jun 2014   #66
Mugsy

Win7 Home Premium x64
 
 

Quote   Quote: Originally Posted by gregrocker View Post
Perhaps you have a UEFI system with CSM allowing an MBR bootable disk in it.
Yes, this is the case. Sorry for any confusion.
My System SpecsSystem Spec
09 Jun 2014   #67
truerock

Windows 7 Ultimate 64-bit sp1
 
 

After I started this post I found that Windows 7 does not support UEFI... although UEFI CSM works with Windows 7. Windows 8 does support UEFI... and I expect Windows 9 is where Microsoft will finally get its UEFI act together.

This is what Wikipedia has about UEFI CSM:
**********************************************************
Compatibility Support Module (CSM) booting
For backwards compatibility, most of the UEFI implementations on PC-class machines also support booting in legacy BIOS mode from MBR-partitioned disks, through the Compatibility Support Module (CSM) which provides legacy BIOS compatibility. In that scenario, booting is performed in the same way as on legacy BIOS-based systems, by ignoring the partition table and relying on the content of a boot sector.

BIOS booting from MBR-partitioned disks is commonly called BIOS-MBR, regardless of it being performed on UEFI or legacy BIOS-based systems. As a side note, booting legacy BIOS-based systems from GPT disks is also possible, and it is commonly called BIOS-GPT.

Despite the fact MBR partition tables are required to be fully supported within the UEFI specification, some UEFI firmwares immediately switch to the BIOS-based CSM booting depending on the type of boot disk's partition table, thus preventing UEFI booting to be performed from EFI System partitions on MBR-partitioned disks. Such a scheme is commonly called UEFI-MBR.
********************************************************************************

Apparently when I installed Windows 7 64-bit on my Intel DZ77GA-70K system board in 2012 I ended up with UEFI-MBR.
So, I'm just going to ignore this mess and wait until Windows 9 comes out and then upgrade. Although, I guess it's questionable if Intel will come out with a DZ77GA-70K UEFI update to support Windows 9.
My System SpecsSystem Spec
13 Jun 2014   #68
CyclonePhantom

Windows 7 Ultimate x64
 
 

My command prompt won't let me continue after I type diskpart. It just gets stuck at:
Microsoft DiskPart Version 6.1.7601
Copyright (C) 1999-2008 Microsoft Corporation.
On computer: MINWINPC
When the Bios does not recognize the Hard drive the diskpart continues. Any fix? Thanks in advance
My System SpecsSystem Spec
13 Jun 2014   #69
gregrocker

 

Is the HD detected in BIOS Setup? If so test it with makers diagnostics Extended CD scan then wipe it from same disk.
My System SpecsSystem Spec
16 Dec 2014   #70
radicalpet

Windows Professional N x64
 
 
This fixed my dual boot after moving (resizing) my windows partition

Thank you so much gregrocker! I know this thread is dead, but someone with my problem might run into it.

DISKPART
LIST DISK
SELECT DISK 0 (confirm from list this is WIn7 HD #)
LIST PARTITION
SELECT PARTITION # (replace # with WIn7 part #)
ACTIVE
EXIT

was precisely what I needed to add Windows painlessly to the bootloader (GRUB) again, after I had moved my primary windows partition from inside debian. I am now glad that I ran into that error, since a normal startup repair would probably have overwritten GRUB with the Windows bootloader.
My System SpecsSystem Spec
Reply

 Startup repair menu doesn't see an operating system




Thread Tools




Similar help and support threads
Thread Forum
Missing Operating System/Startup Repair Failure
Hi, I apologize if this isn't the right subforum but I saw a couple old posts about this in General. Yesterday one of my kittens knocked my laptop off my chair causing it to hit my PC tower on the way to the ground. My tower immediately froze and when I went to restart it manually I...
General Discussion
"Operating system: Unknown" when trying startup repair
Hi, turns out that when i get to this window: https://www.sevenforums.com/attachments/tutorials/963d1234780861-system-recovery-options-system_recovery_options.jpg Instead of "Operating system: Windows 7" i get "Operating system: Unknown" and when I try to repair startup, it fails, what could...
Performance & Maintenance
how do i Repair or Reinstall operating system
Acer Aspire 17.3 laptop. had black screen with a few words eg. no system. used F10 and now have Windows Boot Manager black page with Windows failed to start and 1,2,3 insert disk and restart. choose Enter and it offers Window 7 Enter or F8. all choices come back to these same 2 pages. Ctrl+Alt+Del...
Installation & Setup
MBR Missing, but no operating system to choose when I try to repair
So last night I was listening to iTunes when all of a sudden my music stopped and the hard drive light stayed on steadily. I decided to reboot the computer, and lo and behold when the BIOS splash screen went away, it said the "master boot record missing, press ctrl + alt + del to reboot" or...
Backup and Restore
MBR damaged and Win7 System Recovery menu doesn't see an operating sys
Hi everyone, I'll keep it short and to the point. What I had initially: What I did: Now, Problem: MBR got damaged as win XP partition was formatted (which had bootloader) and thus I can't login to win 7 from Ubuntu Grub.
Installation & Setup
Startup repair loop - Can't repair with system restore/repair/commands
Hello, I've been unable to access my custom build computer since around 5:00 yesterday. I chose to restart my computer at around that time just because it was slowing up a little and I usually do that to help, I had not installed any updates or new programs since 2 days ago when there had been a...
BSOD Help and Support


Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 17:35.
Twitter Facebook Google+ Seven Forums iOS App Seven Forums Android App