Windows Backup fails with 0x80070002: "The system cannot find the file specified"

Windows 7 Backup is failing. When backing up even a single insignificant directory (e.g. I chose only the empty "Contacts" directory, leaving all other directories unchecked), I get this error within a few seconds and the backup fails. If I uncheck all files/directories, and just do the system image - then the system image is backed up OK without issue.

Backup destination is an external USB hard drive.

Steps to reproduce and subsequent failure:

1. Set up backup to go to external hard drive. Don't back up system image. Back up "Contacts" directory only for my profile.


2. Start backup.


3. Immediately view the status of the backup, it stays on "Creating a shadow copy..." for a few seconds, and then the backup fails.



4. Click Options button, and it says "Check your backup / The system cannot find the file specified." - with options to "Try to run backup again" or "Change backup settings". If I click "Show Details", then it says:

   
   

   Backup time: 4/12/2012 04:38
   Backup location: My Book (D:)
   Error code: 0x80070002
   




5. An examination of the Event Log shows nothing useful beyond the following:

   
   

   Log Name:      Application
   Source:        Windows Backup
   Date:          4/12/2012 04:38:44
   Event ID:      4104
   Task Category: None
   Level:         Error
   Keywords:      Classic
   User:          N/A
   Computer:      JTJLaptop
   Description:
   The backup was not successful. The error is: The system cannot find the file specified. (0x80070002).
   Event Xml:
   
     
       
       4104
       2
       0
       0x80000000000000
       
       23979
       Application
       JTJLaptop
       
     
     
       The system cannot find the file specified. (0x80070002)
   02000780E30500003F0900005B090000420ED1665C2BEE174B64529CB14610EA71000000
     
   
   

What I have tried:

• ChkDsk on both C: (main drive) and D: (backup drive) doesn't find any errors.


• Running SFC /SCANNOW to run system file checker


• Checked the list of profiles at HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList and ensured that each profile directory exists.

I'm stumped; WHAT file can't be found and why is my backup failing?

This is on a Lenovo T420 laptop.

Answer

I finally figured out the problem. The hidden system reserved partition contains boot configuration data (BCD). Unfortunately, this partition was offline and so was inaccessible. This caused Windows Backup to fail with the symptoms I originally described. However, other parts of Windows are affected, too.

How this happened: I installed 3rd-party disk partitioning software to shrink the size of the system reserved partition and then enlarge the main partition. I then uninstalled that software. I believe it was after this was done that Windows Backup ceased to function.

The problem is described very well here: System Partition goes offline on Windows Server 2008 and Windows server 2008 R2 after installing some 3rd Party Disk or Storage Management Software. My solution was to turn on automount and then rebooting as described in this MSKB article. It is not necessary to give the system reserved partition a drive letter - you just want to turn on automounting and reboot.

While you are checking, you should be sure that the system reserved partition is also the active partition. This fixed the problem for some users (although for me, it was already active and the problem was simply that it was offline).

Other symptoms of this problem - all stemming from the fact that the partition is offline:

• bcdedit fails with the error "The system cannot find the file specified" when you run it from an elevated command prompt.


• bcdboot doesn't work either.


• msconfig's Boot tab is empty and non-functional.


• You get errors when rebooting from BitLocker-Driver in the Advanced Event Log, complaining that Encrypted volume check: Volume information on \\?\Volume<volumeID> cannot be read. - even if you don't use BitLocker or have Windows 7 Ultimate.


• The list of operating systems in the System Control Panel's Advanced tab is empty.


• Viewing the partition from Disk Management doesn't show the file system type or volume label for the system reserved partition.


• Windows Backup fails with 0x80070002.

Note that there are many other reasons for why Windows Backup fails with 0x80070002 - the error reporting in this product is extremely bad. It would be extremely helpful if Windows Backup would so much as even emit a verbose log file describing what it does.

What tipped me off to this investigation in regards to my BCD configuration was some discussions on Microsoft TechNet at http://social.technet.microsoft.com/Forums/en-US/windowsbackup/thread/5e9150e6-809b-4e2a-9360-55567678a9e3. In particular Sneha from Microsoft notes 5 common causes to this issue:

Regret the inconvenience caused. The different causes for 80070002
error that we have seen so far are:

1. USB controller issue for target connected via USB (Not an issue in your case)


2. Machine has a dual boot configuration with Linux and uses Grub2 bootloader.


3. Backup happens to a network target over a wireless connection with disconnects.


4. Snapshot on the source volume gets deleted while the backup is in progress due to very little shadow copy storage area on the source.
   Type 'vssadmin list shadowstorage' from an elevated command prompt and
   have a look at the Maximum shadow copy storage space for the source
   volume included.


5. The source volume has disk errors (which is most probably not your scenario since running chkdsk has not solved the problem for you)

Cause #2 caught my eye and made me wonder "is something wrong with my boot setup?"