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Windows 7: PC keep shutting down then says "NTLDR is missing"

05 Mar 2019   #11

Microsoft Community Contributor Award Recipient

Vista x64 / 7 X64

Quote   Quote: Originally Posted by ian50 View Post

Your comments are always worth understanding.

What is "pbr", please ?

What does bootice64.exe do exactly, please ?
PBR Partition Boot Record. Sometimes called VBR (Volume Boot Record).
It is a bit of code on the first sector of a volume. For win7 it should launch bootmgr. If bootmgr can't be found on that volume you will get the bootmgr missing message. If you get a message about NTLDR, there is something wrong with the code.

These are the messages you could get from valid win7 PBR

disk read error occurred...
BOOTMGR is missing...
BOOTMGR is compressed...
Press Ctrl+Alt+Del to restart

Bootice is an application that can write various mbr and pbr code, among other things.

Download the zip file and have a look. That is a lot quicker than me explaining everything.

My System SpecsSystem Spec
05 Mar 2019   #12

Windows 7 Pro x64


Thanks for the reply.

With bootice, I was concerned that it may do something straight off the bat when opened but I've found it's tutorial page so that concern is resolved. I've kept this program as a "may be needed".

I had not appreciated to any degree the difference between the pbr and the mbr. So thanks for that useful information.
My System SpecsSystem Spec
01 Apr 2019   #13

windows 7 64 bit

Hi Guys

Thought you might be interested to know what the problem was in the end. My internal HDD was knackered. I was getting Disk errors in my windows log and my HDD was making strange noises.

Anyways this was the cause of my PC shutting down along with the occasional BSOD.

I ran HDD "health checkers" and they said my HDD was fine.

Anyway I put in a new SSD and all is good now.

Cheers, Andrew
My System SpecsSystem Spec


 PC keep shutting down then says "NTLDR is missing"

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