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Windows 7: windows 7 boot loader missing/corrupt

02 Nov 2010   #11
chbell10

Windows 7 Ultimate x64
 
 

I followed alot of the steps provided in the article, as his dilemma seems almost mirrorative of mine, and it now sees the OS, although it cannot repair it.
i ran setup three times again with reboots, and nothing-other than when booting now, instead of the old error message, i get "disk read error, ctrl alt del to continue"
that sounds bad guys.
sounds really bad.


My System SpecsSystem Spec
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02 Nov 2010   #12
mjf

Windows 7x64 Home Premium SP1
 
 

c:\boot ........etc
assumes your boot folder's on c:
If you've got a 100MB active system reserved partition it's on there.

If that's the case you will need to temporarily assign it a letter & use that letter.
I'm a bit surprised you would need to resort to this.

you might want to run bcdedit and post a screenshot of the output.
My System SpecsSystem Spec
03 Nov 2010   #13
SolarWind

Windows 7 professional x86/
 
 

Removing grub should be a quite painless operation. I have installed distro after distro and each time fixmbr has removed grub without issue. I then use diskwizard to remove and merge the partition into C:

Disk read error is just another symptom of a corrupt MBR (In your case)

Well as it now see's the OS and grub seems to have gone - now would be a good time to try bootrec.exe /fixmbr etc.
My System SpecsSystem Spec
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03 Nov 2010   #14
chbell10

Windows 7 Ultimate x64
 
 

I ran the bootrec.exe commands, with no change in the output, although when i did the startup repair again this time, the root error cause was as follows:

root cause found:
------------------------------------------------
Boot sector for disk partition is corrupt.

Repair action: Boot sector repair
Result: failed: Error code = 0x49c
-------------------------------------------------

Another thing that i tried doing was swaping the active drives around between the available partitions, and when i activated E:, and ran the command "Bootrec.exe /Rebuildbcd", it gave me the output That the boot sector of the disk might be corrupt, and as this is the partition where it tells me there is a windows installation (when running "bootrec.exe /Scanos"),i wonder if there is anything that could be done to repair the corrupted boot sector?
My System SpecsSystem Spec
03 Nov 2010   #15
mjf

Windows 7x64 Home Premium SP1
 
 

Post a disk management screen shot!
My System SpecsSystem Spec
03 Nov 2010   #16
chbell10

Windows 7 Ultimate x64
 
 

How would I do that?
I wouldnt know how to take a screenshot without being first booted into windows 0_0
My System SpecsSystem Spec
03 Nov 2010   #17
SolarWind

Windows 7 professional x86/
 
 

Free Download Magic Partition Manager Software - Partition Wizard Online

Can you make a bootable flash or disc? You can then have a good look at what is going on with regards to partitions file system etc. There is also a utility to rebuild the MBR.

Have you Just one HDD on this machine? Was Windows always E:?

If you manage to run this then try to jot down the partition drive letters, file system etc. Also see if your 100MB partition is there.
My System SpecsSystem Spec
03 Nov 2010   #18
mjf

Windows 7x64 Home Premium SP1
 
 

Quote   Quote: Originally Posted by SolarWind View Post
Free Download Magic Partition Manager Software - Partition Wizard Online

Can you make a bootable flash or disc? You can then have a good look at what is going on with regards to partitions file system etc. There is also a utility to rebuild the MBR.

Have you Just one HDD on this machine? Was Windows always E:?

If you manage to run this then try to jot down the partition drive letters, file system etc. Also see if your 100MB partition is there.
Good idea

Also with with command prompt (via Repair Disk)
>diskpart
>list volumes
.
.
>exit

will give you some info.
My System SpecsSystem Spec
03 Nov 2010   #19
SolarWind

Windows 7 professional x86/
 
 

Maybe if we reassign the drive letter from E: back to C: we may have some success. I'll wait to see what partition wizard brings back.
My System SpecsSystem Spec
03 Nov 2010   #20
chbell10

Windows 7 Ultimate x64
 
 

I ran the partition wizard Boot cd, and all of the partitions are NTFS, and the drive letters don seem to show,as opposed to the drive labels?
But, when i did what MJF suggested, it came up like this:

Volume--ll---Letter----ll----Label----ll--Filesystem---ll----type----ll----size----ll----status
__________________________________________________________________________
----0-----------G---------Cd-rom---------CDFS---------dvd-rom----3562MB-----Healthy
----1-----------D-----------new------------NTFS---------partition-----227GB------Healthy
----2-----------C----------system RESE-----NTFS---------partition-----100MB------Healthy
----3-----------E-------------C------------NTFS---------partition-----235GB------Healthy
----4-----------F-------------SR-----------NTFS---------partition-----2933MB-----Healthy

Windows has always been C:, as far as i have known, and This is the only HDD i have ever used with this build.
And as stated above, the 100mb system reserved partition is there.
Also, when i tried to run the "rebuild BCD" option, under disk>rebuild MBR, the option itself is unusable for some reason?
My System SpecsSystem Spec
Reply

 windows 7 boot loader missing/corrupt




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