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Windows 7: BOOTMGR not found after removing linux and merging partitions

14 May 2013   #11
Kaktussoft

Microsoft Community Contributor Award Recipient

Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
 
 

Thanx for disk managment screenshot. Bootmanager and bootmenu are in RECOVERY partition (it's marked system).
You only have 1 physical harddisk. Still "BOOTMGR IS MISSING" when booting?
How exactly did you boot to win7??


My System SpecsSystem Spec
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14 May 2013   #12
dumdum69

Win7Ux64
 
 

I've been refreshing the page and never noticed there was a 2nd page, lol.

I had a USB with pmagic that i used. i went to extra boot features, loaded GRUB2, scanned for OS, and selected the one for windows, for some reason 2 appear on display. i select the 2nd one. As i was following all the bootsect and bootrec steps, i forgot to remove the USB and what happened was that it put a file called BCD in the USB. if i load the pc off the USB, it loads perfectly. That's how i got it on.
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14 May 2013   #13
Kaktussoft

Microsoft Community Contributor Award Recipient

Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
 
 

What I think is: You boot from usb to grub2. It chainloads to BCD file on partition RECOVERY.
Partition - Mark as Active method ONE. Mark partition RECOVERY (D) active. Now try to boot normally (no usb stick attached!). What error message?

In Elevated Command Prompt
Code:
attrib  c:\bootmgr
attrib  d:\bootmgr
Is bootmgr on C or D?
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14 May 2013   #14
dumdum69

Win7Ux64
 
 

MERCI KAKTUSSOFT!

it is on D.

After changing the active partition, it boots without the USB. Almost as good as new. it just has a blinking underline on the top left for a split second and does take a tiny bit longer to load. but it works. Is it completely fixed now or are there a few more steps to take?
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14 May 2013   #15
Kaktussoft

Microsoft Community Contributor Award Recipient

Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
 
 

Quote   Quote: Originally Posted by dumdum69 View Post
MERCI KAKTUSSOFT!

it is on D.

After changing the active partition, it boots without the USB. Almost as good as new. it just has a blinking underline on the top left for a split second and does take a tiny bit longer to load. but it works. Is it completely fixed now or are there a few more steps to take?
Only problem was: C was active partition! It said "missing bootmgr" all the time. Boot sequence is as follows (sort of):
  1. Find harddisk
  2. load sector 0 of harddisk, the bootcode (MBR)
  3. bootcode searches for active partition and loads its bootsector and runs that code. (sector 0 of partition)
  4. In that code is an instruction to run file bootmgr.
  5. bootmgr loads file \boot\bcd the boot menu.
"bootmgr missing" means it fails in step 4!! Indeed C was ACTIVE and doesn't have bootmgr

boot using an usb stick with special bootcode works different of course. Most likely it scans all partitions for known files like bootmgr, grub and so on and jumps to it. Most likely bootrec and bootsect commands modified the usb stick.

I don't know who did make C ACTIVE (that's why partition RECOVERY became INACTIVE. Only 1 ACTIVE partition is allowed for each physical disk). Linux didn't touch RECOVERY and WIN7 partition (why should it). I think all is fine now
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14 May 2013   #16
dumdum69

Win7Ux64
 
 

Thank you very much. Thanks to everyone else as well. Does anyone have any advise as to where i can learn more on repairing OS and software issues like this? Or just learn more in general? Super hard to locate study material for A+ so i'm stuck.
My System SpecsSystem Spec
14 May 2013   #17
dumdum69

Win7Ux64
 
 

Actually, one small issue has come up that i just noticed. Now, when i open up "My computer", it shows a 2nd drive called D. the Recovery one. This was never up before i installed linux. i know it's the recovery one and would like for it to remain invisible except for when i have to reformat. any ideas?
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14 May 2013   #18
Kaktussoft

Microsoft Community Contributor Award Recipient

Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
 
 

Quote   Quote: Originally Posted by dumdum69 View Post
Actually, one small issue has come up that i just noticed. Now, when i open up "My computer", it shows a 2nd drive called D. the Recovery one. This was never up before i installed linux. i know it's the recovery one and would like for it to remain invisible except for when i have to reformat. any ideas?
disk managment. Right click on the RECOVERY partition. Drive letter->remove
Is that what you mean?
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14 May 2013   #19
dumdum69

Win7Ux64
 
 

Thanks! that worked. any chance you have any tips as to where i can go or what i can do to learn more about things like this?
My System SpecsSystem Spec
14 May 2013   #20
Kaktussoft

Microsoft Community Contributor Award Recipient

Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
 
 

Quote   Quote: Originally Posted by dumdum69 View Post
Thank you very much. Thanks to everyone else as well. Does anyone have any advise as to where i can learn more on repairing OS and software issues like this? Or just learn more in general? Super hard to locate study material for A+ so i'm stuck.
Troubleshooting Windows 7 Failure to Boot
And may other tutorials on sevenforums

Booting - Wikipedia, the free encyclopedia
Master boot record - Wikipedia, the free encyclopedia
Volume boot record - Wikipedia, the free encyclopedia

What special things you want to learn? Google is your friend!
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 BOOTMGR not found after removing linux and merging partitions




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