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Windows 7: Fix dual boot mistake


13 Nov 2012   #1

Windows 7 Home Premium 64bit
 
 
Fix dual boot mistake

Hi,
So I was dialing booting windows 7 and Windows 8.
I decided to format my windows 8 partion as I did not want window 8 anymore.
Windows 8 was my default OS and before I shut down my computer I forgot to change my default OS to windows 7. Now everytime I boot my PC it goes to windows 8 logo and says "diagonsing PC"
And reboots and does same thing.
How can I boot into 7 I have tried start up repair


My System SpecsSystem Spec
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13 Nov 2012   #2
Microsoft MVP

 

Hey Mitch, long time no hear!

First do Option two of Mark Partition Active on the Windows 7 partition. You can also boot the Partition Wizard CD you have to right click 7 partition to Modify>Set to Active, OK, Apply.

Next from the Windows 7 DVD System Recovery Options run Startup Repair - Run up to 3 Separate Times until Windows 7 starts and holds the System Active boot files.

Then open Disk Mgmt, maximize the window, post back a screenshot of your drive map and listings.
My System SpecsSystem Spec
13 Nov 2012   #3

Windows 7 Home Premium 64bit
 
 

I can get it to select partition, but i can't do the very last step.
When I type active it says no partition selected, which it should because I'm following steps
My System SpecsSystem Spec
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13 Nov 2012   #4

Windows 7 Home Premium 64bit
 
 

Sorry I manged to do the disk partition but it did not work.
Did I mention that its all one partition, it just boots into windows 8 and if I run start up repair it gives me windows 7 or 8
My System SpecsSystem Spec
13 Nov 2012   #5
Microsoft MVP

 

How did it get to be one partition if you were Dual Booting, which requires two partitions?

Did you delete the Windows 8 partition? How did you do this? Did it try to stop you?

What does Diskpart report when you type List Partition after selecting the disk:

Diskpart
List disk
Sel Disk 0 (are there any other disks listed?)
List partition
My System SpecsSystem Spec
13 Nov 2012   #6

Windows 7 Home Premium 64bit
 
 

Quote   Quote: Originally Posted by gregrocker View Post
How did it get to be one partition if you were Dual Booting, which requires two partitions?

Did you delete the Windows 8 partition? How did you do this? Did it try to stop you?

What does Diskpart report when you type List Partition after selecting the disk:

Diskpart
List disk
Sel Disk 0 (are there any other disks listed?)
List partition
Ok so I decided I didn't want windows 8 so I formatted partition and merged it back to one. but windows 8 was the default OS so now it tries booting into that
disk part report one partition of 931gb which is its storage.
I did it via partition wizard and I don't have have a CD for it. It didn't stop me.

Kinda getting stressed need to print school assessment D:
My System SpecsSystem Spec
13 Nov 2012   #7
Microsoft MVP

 

WHen I ask for any other disks listed and you reply one partition of 931gb are you answering my question?

Is Disk 0 the only disk and Partition 1 the only partition of 931 gb?

If so type

DISKPART
SEL DIS 0
SEL PAR 1
ACTIVE
EXIT

Now run Startup Repair 3 separate times no matter what it reports to see if Windows 7 will start.
My System SpecsSystem Spec
13 Nov 2012   #8

Windows 7 Home Premium 64bit
 
 

Yes disk 0 and partition one is the only one listed.
Identity what you just said the same method as before? Because that doesn't work

If I was to do the method again, do I run start up then restart computer and do it again or click finish cancel and run it again
My System SpecsSystem Spec
13 Nov 2012   #9
Microsoft MVP

 

You need to restart between each repair to see if Windows 7 starts. It may not take 3 repairs.

If this fails, boot back into Command Line to type:

DISKPART
LIST VOL
SEL VOL * (replace * with Windows 7 volume #)
SHRINK desired=50,000

Boot Win8 or Windows 7 installer to run a rescue install, when it starts boot into your old Windows 7 install, set it Default with no Boot menu in Control Panel>System>Advanced Options>Startup Settings. Then in Disk Mgmt make sure your old Windows 7 partition is marked System Active, delete the rescue partition.

If you want to reinstall Win8, I have an exact replica Windows 7 start menu to replace the crApptastic Button Wall: Ex7ForW8.
My System SpecsSystem Spec
13 Nov 2012   #10

Windows 7 Home Premium 64bit
 
 

Ok well the first method didn't work I will try. When in start up repair do I select windows 7 or 8.
Ive been checking seven.

I'm trying you second method... Two questions
1. For shrink do I put in square bracets the number.
2. I don't quite get what you mean when boot into 7/8. How does that work?

Edit sqaure bracets don't work. Get error
My System SpecsSystem Spec
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 Fix dual boot mistake




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