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Dual booting with only one OS

Posted on 2013-06-06
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Last Modified: 2013-06-07
Hi experts,

When I boot my computer, it always stops at a choice of three OS:

Windows 7
Microsoft Windows 7
Microsoft Windows 7

All of these are also located in the dropdown menu in Startup and Recovery. This would be great except I have only one hard drive and one OS. I don't want to stop each time during bootup.

Is it possible for me to delete the other two non-existent OSs?

Thanks.

Bert
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Question by:Bert2005
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10 Comments
 
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Accepted Solution

by:
tailoreddigital earned 500 total points
ID: 39227777
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LVL 16

Expert Comment

by:Raymond Peng
ID: 39227785
it's under the boot tab when you go to start > msconfig

make sure you delete the incorrect listings.

you can verify which one is your default by going to system properties > advanced > startup and recovery > make a note of the default operating system and compare it with the Boot manager.
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LVL 31

Expert Comment

by:Frosty555
ID: 39227791
Yes, using the BCDEDIT command line tool.

Open a command prompt with administrator privileges and type in:

BCDEDIT

You'll see a list of items, similar to this:

Windows Boot Manager
--------------------
identifier              {bootmgr}
device                  partition=\Device\HarddiskVolume1
description             Windows Boot Manager
locale                  en-US
inherit                 {globalsettings}
integrityservices       Enable
default                 {current}
resumeobject            {78e88e49-a093-11e0-9496-ecba30f49f85}
displayorder            {current}
toolsdisplayorder       {memdiag}
timeout                 30

Windows Boot Loader
-------------------
identifier              {current}
device                  partition=C:
path                    \WINDOWS\system32\winload.exe
description             Windows 8
locale                  en-US
inherit                 {bootloadersettings}
recoverysequence        {78e88e4b-a093-11e0-9496-ecba30f49f85}
integrityservices       Enable
recoveryenabled         Yes
allowedinmemorysettings 0x15000075
osdevice                partition=C:
systemroot              \WINDOWS
resumeobject            {78e88e49-a093-11e0-9496-ecba30f49f85}
nx                      OptIn
bootmenupolicy          Standard

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You will probably have three different "Windows Boot Loader" sections in the output that your computer presents to you. Take note of the "identifier" field for each one.

You can now run a number of commands to manipulate the boot loader configuration:

sets the timeout to be 5 seconds before it boots into the default option
BCDEDIT /timeout 5  

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sets the default boot option to the boot loader entry identified as {cbd971bf-b7b8-4885-951a-fa03044f5d71}:
BCDEDIT /default {cbd971bf-b7b8-4885-951a-fa03044f5d71}    

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deletes the boot loader entry identified as {cbd971bf-b7b8-4885-951a-fa03044f5d71}:
BCDEDIT /delete {cbd971bf-b7b8-4885-951a-fa03044f5d71}

Open in new window


You can delete the unneeded boot entries, and/or you can set one as the default and have the system automatically boot into that option after a certain timeout period


This is a dangerous command line tool - if you delete the wrong entry or otherwise mess around with the boot loader.... your system will fail to boot! So be careful!
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LVL 54

Expert Comment

by:Joe Winograd, EE MVE 2015&2016
ID: 39227792
Hi Bert,

Here are the steps:

Start menu
Run
Type msconfig in the Open box and click OK
Boot tab

You'll see this:
boot menuOf course, yours will have the two entries that you don't want under the Current/Default OS entry (I like to get the menu when booting so I put the "Just to get this menu" item in there for a time period of 99 seconds). Highlight each entry that you don't want and click the Delete button. That should do it. Regards, Joe
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LVL 1

Author Comment

by:Bert2005
ID: 39227796
Thanks. So, obviously, both of these answers worked as they were the same. :-)

I am never quite sure how to give the points on these. Do I just give it to the first correct answer?

Thanks.
0
 
LVL 23

Expert Comment

by:tailoreddigital
ID: 39227798
Whichever solves your issue
0
 
LVL 1

Author Comment

by:Bert2005
ID: 39227801
Actually, more than two. I don't think I have ever got this many answers so quickly.

Joe, why do you do the 99 seconds? I guess it is so you can select the first without worrying about Windows trying to boot to the second. Can you tell me the advantage of putting in
"just to get this menu" is?

Thanks.
0
 
LVL 1

Author Closing Comment

by:Bert2005
ID: 39227809
Well, they all worked and were all helpful, and each supplied a little added information. But, I think the rule I have always heard is to give the points to the first answer that solves the issue.

Thanks everyone.

Bert
0
 
LVL 54

Expert Comment

by:Joe Winograd, EE MVE 2015&2016
ID: 39227904
Bert,
Sometimes after a restart, I don't want it to boot into Windows, but without the OS prompt, it will (unless I catch it quickly before Windows starts). So I put the "Just to get this menu" choice in the OS list with 99 seconds, which gives me plenty of time to stop the loading of Windows...and, of course, if I do want to load Windows and don't want to wait 99 seconds, I simply hit the Enter key. Also, if I want more than the 99 seconds, hitting the down arrow key at that menu stops the countdown timer and stays there forever until I hit the up arrow and Enter to load Windows. Regards, Joe
0
 
LVL 1

Author Comment

by:Bert2005
ID: 39231014
Thanks Joe. I see what you mean.
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