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Windows 7: Broken MBR/Boot/System Partition

23 Feb 2011   #11

Microsoft Community Contributor Award Recipient

Vista x64 / 7 X64

You woud create a primary as you tried to - normally. However, you can't do that in this situation - you need a 3rd party app.

My System SpecsSystem Spec
23 Feb 2011   #12


The problem if 100mb System Reserved and Win7 partitions are within an Extended Logical Partition is that you must normally delete all but one of the Logical sub-partitions to get Partition Wizard bootable CD to Modify>convert to Primary.

Diskpart List shows a HD with 465gb size but also shows two partitions with 465gb size each. Something is wrong.

Please download and burn to CD free Partition Wizard from link SIW2 posted, then post back the accurate partition sizes and listings - a camera snap would be nice.

If you only have two partitions - 100mb and Win7 - then try to rightclick the extended Logical to Modify>Convert to Primary. If it won't allow this, then Delete the 100mb partition and try again. Next rightclick Win7 partition to Modify>Set Active. Then boot into Win7 DVD Repair console or Repair CD, accept any offered repair. If it doesn't start, boot back into DVD/CD Recovery Options to run Startup Repair up to 3 separate times with reboots until it starts.

It is incorrect that deleting GRUB alone will safeguard against corruption of Win7 which we see here a lot. The HD must be wiped if this is what has happened.
My System SpecsSystem Spec
23 Feb 2011   #13

Windows 7 Home Premium 64 bit

I have plugged in the drive with a sata/usb cable, and I can see the contents. Using EASEUS Partition Master to "convert Logical to Primary" on the windows 7 drive

So, there will be one partition, Windows 7 as Primary. When this is done, how do I re-build the proper boot settings?

Edit: the pc threw an has a problem insert your boot CD to fix.
So I did and under repair your computer, it popped up saying it detected and can fix, do you want to restart?
so I did, and now it shows Windows 7 Home Premium and the 475819MB partition (C Seven-64 [name I gave it a while ago]

Now I go to startup repair.

Attempting repairs...
Repairing disk errors. This might take over an hour to complete.

I will have to check this after class and a meeting.

I'll keep you updated. Thanks for the help.
My System SpecsSystem Spec

23 Feb 2011   #14


Did you mark Win7 partition Active?

It would be better if you would use free Partition Wizard bootable CD as it has helped fix hundreds of these issues here without fail. If three Startup Repairs with reboot on marked-Active Win7 partition do not work, then running Rebuild MBR from PW CD Disk tab sometimes does.

A camera snap of the drive map with listings of partition manager CD can also reveal other problems to be solved.
My System SpecsSystem Spec
23 Feb 2011   #15

Windows 7 Home Premium 64 bit

embarrassed to say that I don't have any blank CD's with me here in my dorm.

I can install the Partition Magic on my laptop and use the cables if I need to.

I see:
Windows 7 Home Premium (recovered) | 476819MB | ( C: ) Seven-64
under System Recovery Options

I apologize that I am bothering you guys with this issue, I'll try my best to follow your instructions quickly and post an update.
My System SpecsSystem Spec
23 Feb 2011   #16

Windows 7 Home Premium 64 bit

This is off my laptop and I have the drive plugged in with sata to usb cable.

While I have access to it like this it shouldn't be hard to perform things with it right?
My System SpecsSystem Spec
23 Feb 2011   #17

Windows 7 Home Premium 64 bit

Ubuntu 9.04 disc
-> Boot from first Hard Drive
-> Boots Windows 7 fine and everything works.

Now I'm going to remove the CD and restart. IF it doesn't boot, then obviously there is a minor error.
(I think boot might be unchecked on the partition, if so, do I just check it with gParted?)

Thanks everyone, I'll post in a minute
My System SpecsSystem Spec
23 Feb 2011   #18

Windows 7 Home Premium 64 bit

evidently my edit was eaten by flaky wifi.

making this post from my working Windows 7 pc now.

I don't need a 100mb partition. The drive is all one partition. It works and boots fine now. No GRUB. No Linux. No errors, fast boot. It's amazing.

I only had a problem because I was careless when I resized Windows 7 and accidentally ate the 100mb boot partition. Turns out you can circumvent that. It's kind of a silly idea in the first place.

I'm keeping my laptop with GRUB -> ubuntu/Win7 and I'll set up virtualization on my desktop.

Thanks for the help, everyone. I wasn't willing to give up or format.


My System SpecsSystem Spec
23 Feb 2011   #19
Bare Foot Kid
Microsoft MVP

W 7 64-bit Ultimate

You can have your cake and eat it too, it can function from anywhere you put it as long as it's on a Primary partition; if you understand its uses, it really is very useful/helpful.

System Reserved : Create Using Disk Management

System Reserved : Multi Boot from Logical Partitions

Good to see you got it booting.
My System SpecsSystem Spec

 Broken MBR/Boot/System Partition

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