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Windows 7: Backup Error code: 0x81000019

01 Aug 2010   #31

windows 7 64bit on both

Thank you all so much! you guys are awesome! everything worked. i removed the partition, startup repair fixed the master boot record, the computer runs like is always does with no hiccups, and the windows backup is working fine as i type this! you guys are awesome!

sorry again for keeping anyone up so late. I'm a soldier over in Korea and i always forget about the ~14 hour time difference. i really appreciate this guys. now i can back up my system, and put in my new hardware.

My System SpecsSystem Spec
01 Aug 2010   #32

MS Windows 7 Ultimate SP1 64-bit


Glad to see that GregRocker's very sound advice fixed your problem.

I'm now back among the living.

I VERY STRONGLY recommend making a System Repair disk.

START | type System Repair | Enter key | Create Disk button

My next strong recommendation is to backup your drive.

If your system bottoms out or your computer gets stolen then you will not have lost everything dear to your heart.


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Disk Management (DiskMgmt.msc)
Disk Partitioning (DiskPart)
My System SpecsSystem Spec
01 Aug 2010   #33

windows 7 64bit on both

thanks karlsnooks! and thanks for all your help too. the windows backup worked fine. and all is well again.

My System SpecsSystem Spec

01 Aug 2010   #34

MS Windows 7 Ultimate SP1 64-bit

Glad that we could be of assistance. And glad to hear that backup went smoothly.
My System SpecsSystem Spec
01 Aug 2010   #35
Microsoft MVP


Glad it worked.

It was A Guy's research that discovered the 100mb Sys Reserved must have at least 40mb Free Space to create an image. This is important new information that I was unaware of and led directly to the solution of removing 100mb partition which is a much more common operation here.

Thank you for your service there in Korea. We are glad to help you here anytime for any reason.
My System SpecsSystem Spec
01 Aug 2010   #36
A Guy

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium x64 SP1

socrgy9, that's great. That's what we were hoping. Glad you got it sorted, and thank you for your service, we all appreciate that. A Guy
My System SpecsSystem Spec
30 Nov 2010   #37

Windows 7 Ultimate x64
If these steps dont solve your problem try this

First off thanks for everyone in this forum who contributes. If you tried these steps and it still would not work for you and you have a large hard drive it may be necessary to expand the size of the hidden system drive. I read lots of posts on this here and elsewhere. On one technet post from a Microsoft poster it said that for drives with 500GB may need as much as ~224MB free space on the system drive. I have a 1TB drive with only about 200GB used. The same microsoft technet post said you may need 1GB or more space in your hidden drive for a 1TB+ drive.

I used Partition Wizard to make mine about 1800 MB. Everything is finally working for me finally. My 100MB system partition had 75MB free. What finally solved my issue was everything in this thread AND expanding the size of this partition.

On more thing to check is your system restore for the C: drive. I noticed that was getting broken by some of the partion resizing and MBR repairs...

Thank you all for the help. Adding some of my own.
My System SpecsSystem Spec
08 Jan 2011   #38

Windows 7
Windows 7 Backup failed with error code: 0x81000019


Since I usually use as my point of reference for most of the problems I encountered with my PC, I want to share my experience with other users in order to help them as well.

For two weeks now, I have been trying to fix the aforementioned error code: 0x81000019 regarding the windows 7 backup failure, I finally came up with a happy ending. Here is the drill:

First off, before anything one has to log in to an administrator level account.

1- The root cause of the problem is "System reserved" partition whose capacity for free space cannot be under 40 MB. Mine was at 31 MB at the time I was trying to back up and I always ended up with the following error message we all know of:

 Backup Error code: 0x81000019-win-7-backup-error-message.png
2- I created a new volume in "Disk Mangement" from my Windows (C:) Drive as allocated space of let say 490 MG. This volume will be used to resize or expand "System Reserved" partition.

3-Trying to resize the darn partion (system Reserved) after going to Disk Management by right-clicking on it, the "Extend Volume" in the context Menu was greyed out. So, it was practically impossible to click on it.

Remember, to go to Disk Management: Click on Windows ORB >>> Right-click on Computer >>> Left Click on Manage >>> In Computer Management Window, click On Disk Management under Storage. That should give you a good view of all the primary and Logical partition on your PC.

Backup Error code: 0x81000019-disk-management.png

The workaround was to use "Acronis Disk Director Suite". After firing up the latter, a window similar to the one in Windows Disk Management is open. There, I clicked on "System Reseved" partition and then click on "Resize" under Operations in the left pane. Another window opens telling you that before the action can be completed you have to commit it. So, I clicked on "Commit pending operations" in the ToolBar. That will basically close Windows 7 as if it was restarting. Let Disk Director finish its task. Once the operation has completed, the log in screen should show up again.

Backup Error code: 0x81000019-acronis-disk-director-11-home.png

4-After logging in and going back to disk Management, you would notice that "Disk Director Home 11" didn't actually resize the "System Reseved partition, but only put the New volume created in step 2 contiguous to the System Reserved partition. Now, if you right-clck on the latter, the "Extend Volume" was no longer greyed out and you could click on it to alow the resizing of "System Reserved" partition.

Once done, I could run Windows 7 backup without any glitch whatsoever. So, I didn't have to delete the hidden "System Reserved" partition or do any Diskpart in command Line. In my humble opinion, the main problem for most users was to find a way to resize that troublesome partition.

According to most forums I browsed through, they say that the "System Reserved" should never be more than 500 MB in capacity. I don't think that holds true because mine is at 587 MB as can be seen from the screenshot below and didn't prevent my backup to run successfully up to the end.

Backup Error code: 0x81000019-system-reserved-used-free-space.png

Ted Pacheco.

My System SpecsSystem Spec
09 Jan 2011   #39
Microsoft MVP


Thanks, Ted. Since this post first appeared we have helped several with this issue resize the System Reserved partition to around 200mb which seems to be plenty big.

The tool to use is free Partition Wizard bootable CD, which unlike other partitioning tools uses DataSafe so that it won't fail (just reboot and try again until you bail out at startup). You need to resize Win7 partition first from the left by about 100mb, then resize SysRserved into the space you've created using PW or Disk Mgmt to extend Partition.

Be prepared with DVD Repair console or Repair CD as any resizing on the boot sector might require Startup Repair to be run a few times to repair the MBR. Don't allow SysReserved to lose its Active flag, either.

If you have any further questions or issues, open a new thread for help.
My System SpecsSystem Spec
20 Mar 2011   #40

Windows 7 Ultimate x86 Retail

I've recently restored from Windows system images, both XP & 7. I now get the backup-error-code-0x81000019. Shadow copy fails in but a few seconds. I am confused about the System Reserved Partition as cannot see one at all?

Please see attached.

EDIT: I did manually delete XP with partition manager, don't ask why. This was a bad move, hence restored from system image, but now backup will not run. Can I create a new System Reserved Partition or am I screwed?

Attached Thumbnails
Backup Error code: 0x81000019-capture.png  
My System SpecsSystem Spec

 Backup Error code: 0x81000019

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