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Windows 7: Dual Boot - Delete a OS

27 Jan 2012   #29
whs

Microsoft Community Contributor Award Recipient

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 
Dual Boot - Delete a OS

How to Properly Delete a OS in a Dual Boot



My System SpecsSystem Spec
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18 Jan 2013   #30
whs

Microsoft Community Contributor Award Recipient

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

John, if you want to move the bootmgr to C, use this: Bootmgr - Move to C:\ with EasyBCD

My System SpecsSystem Spec
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19 Jan 2013   #31
JohnF1938

win 7 Home Premium 32bit
 
 

Thanks for reply. When I try this C: is not available. I have however moved it to the H: drive so the system & Bootmgr are on the same drive.

After doing this I tried to rename the H: drive C: but Computer Management would not alow this.
Regards John
My System SpecsSystem Spec
19 Jan 2013   #32
whs

Microsoft Community Contributor Award Recipient

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Don't muck around with the lettering. Let the system manage that.

Btw: the bootmgr is only being copied, not really moved. I should have chosen another title when I made the tutorial. So wherever it was before, it still is also. But it will not have any effect because EasyBCD has deactivated that partition.
My System SpecsSystem Spec
19 Jan 2013   #33
JohnF1938

win 7 Home Premium 32bit
 
 

Thanks, I have managed to stop windows including the F: drive in a system image by using EasyBCD to copy BootMng to the h: drive then Format the f:drive. I will leave the system Drive as h:
So I am home and dry.
Regards John
My System SpecsSystem Spec
25 Jan 2013   #34
Kimwu

Win7 Ultimate x64
 
 

Hi!

Thanks for the great tut !! However, after a long research (and about 4/5 boot files repair with WinRE), I believe it misses a very important part, which will cause the system NOT to boot : it cant find any boot file.


You miss a final step 6 !
Under "BCD BACKUP", you have to launch "Re-create boot files" !

I have tested this many times to make sure. Without doing it, the bios wont find the "boot files"
But when doing Step 4 - Reset the BCD / Step 5 - Adding a new entry / Step 6 - Reset the Mbr it works



To my "understanding", there are two parts : the boot files // the boot data config
- When hitting Reset BCD, I guess it will erase everything, files included.
- When adding new entry, you setup the boot data again, but not the files
- When hitting Recreate boot file, you copy the file again.

Files + data = Boot
My System SpecsSystem Spec
25 Jan 2013   #35
Kimwu

Win7 Ultimate x64
 
 

Note: Of course, I might be totaly wrong in my understanding, but in my situation (VaioZ Windows 7 ultimate x64 with only 1 system installed) it didnt work another way.

I am using the 350Mb system reserved partition, and boot files were there for a long time.. that's why I believe the boot files were deleted when hitting reset BCD. At least that's what the bios says.


I should go on esayBCD forum to check what's going on exactly when hitting the reset button / recreate button
My System SpecsSystem Spec
25 Jan 2013   #36
whs

Microsoft Community Contributor Award Recipient

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

That is strange. I have done it several times as described and never had a problem. I wonder why that was different in your case.
My System SpecsSystem Spec
27 Jan 2013   #37
Kimwu

Win7 Ultimate x64
 
 

Alright ..

I have spent some time on the esayBCD online user guide. It's a nice guide, pretty well done.


This page explain what you did in the first page of this guide :
Resetting the BCD - EasyBCD - NeoSmart Technologies Wiki


Then, this one explain some more "possibilities".
Recovering the Windows Bootloader with EasyBCD - EasyBCD - NeoSmart Technologies Wiki

Option 3 is the last one they give, so I guess I was in this situation.

What really *is* odd, is that the missing files were due to the "Reset BCD" first step, for sure. Tested 4 times in a row. So, it is strange indeed they do not advise to "Recreate" the boot files after a "Reset BCD", even if they know its deleting some files.


Anyway, hope my posts might help someone else with the same situation I was, it'es never fun to see a "no operating system" screen just after a fresh install ^^
My System SpecsSystem Spec
07 May 2013   #38
Somebody777

Windows 7 Home 64bit
 
 

Hey guys

I ended up this tutorial with Windows Boot Manager error:
File: \Boot\BCD
Status: 0xc0000098
Info: The windows Boot Configuration Data file does not contain a valid OS entry.


I have not recovery disk and F8 doesn't work

I found this tutorial which explains how to fix problem, but it required full EBCD version software which I can't afford.

Any advice how to fix this problem?
Thanks in advance
My System SpecsSystem Spec
21 Jun 2013   #39
faluppa

w7 64b
 
 
thx

Hi,

I want to thank you for a very well and good explaind step-by-step guide. After I bought a new SSD for my gf's laptop , I installed the os by hooking it up to my desktop. Ever since I had the ' problem ' . Looked everywhere , device manager bios..etc. Should've looked here first . So thank you !
My System SpecsSystem Spec
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